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## Cohen, Daniel C.

Compute Distance To:
 Author ID: cohen.daniel-c Published as: Cohen, D.; Cohen, Daniel; Cohen, Daniel C.
 Documents Indexed: 57 Publications since 1988
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#### Co-Authors

 9 single-authored 10 Suciu, Alexander I. 8 Orlik, Peter 5 Falk, Michael J. 3 Cohen, Frederick Ronald 3 Denham, Graham 3 Farber, Michael S. 3 Varchenko, Alexander Nikolaevich 2 Costa, Armindo 2 Kappeler, Thomas 2 Pruidze, Goderdzi 2 Randell, Richard C. 2 Vandembroucq, Lucile 1 Adem, Alejandro 1 Dimca, Alexandru 1 Goresky, Robert Mark 1 Ji, Lizhen 1 Prassidis, Stratos 1 Schenck, Hal 1 Xicoténcatl, Miguel A.
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#### Serials

 4 Advances in Mathematics 3 Compositio Mathematica 3 Transactions of the American Mathematical Society 3 Topology and its Applications 2 Commentarii Mathematici Helvetici 2 Proceedings of the American Mathematical Society 2 Discrete & Computational Geometry 1 Mathematical Proceedings of the Cambridge Philosophical Society 1 American Journal of Mathematics 1 Annales de l’Institut Fourier 1 Bulletin of the London Mathematical Society 1 Canadian Journal of Mathematics 1 Geometriae Dedicata 1 Journal of the London Mathematical Society. Second Series 1 Journal of Pure and Applied Algebra 1 Mathematische Annalen 1 Pacific Journal of Mathematics 1 Advances in Applied Mathematics 1 Forum Mathematicum 1 IMRN. International Mathematics Research Notices 1 Topology Proceedings 1 Journal of Lie Theory 1 Mathematical Research Letters 1 Algebraic & Geometric Topology 1 Pure and Applied Mathematics Quarterly 1 European Journal of Mathematics 1 Journal of Applied and Computational Topology
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#### Fields

 30 Algebraic topology (55-XX) 27 Several complex variables and analytic spaces (32-XX) 21 Group theory and generalizations (20-XX) 20 Convex and discrete geometry (52-XX) 13 Manifolds and cell complexes (57-XX) 11 Algebraic geometry (14-XX) 3 Combinatorics (05-XX) 3 Mechanics of particles and systems (70-XX) 2 Nonassociative rings and algebras (17-XX) 2 Systems theory; control (93-XX) 1 General and overarching topics; collections (00-XX) 1 Commutative algebra (13-XX) 1 Associative rings and algebras (16-XX) 1 $$K$$-theory (19-XX) 1 Differential geometry (53-XX)

#### Citations contained in zbMATH Open

49 Publications have been cited 432 times in 293 Documents Cited by Year
Characteristic varieties of arrangements. Zbl 0963.32018
Cohen, Daniel C.; Suciu, Alexander I.
1999
On Milnor fibrations of arrangements. Zbl 0814.32007
Cohen, Daniel C.; Suciu, Alexander I.
1995
The braid monodromy of plane algebraic curves and hyperplane arrangements. Zbl 0959.52018
Cohen, Daniel C.; Suciu, Alexander I.
1997
Numerical energy conservation for multi-frequency oscillatory differential equations. Zbl 1083.65117
Cohen, D.; Hairer, E.; Lubich, Ch.
2005
Arrangements and local systems. Zbl 0971.32012
Cohen, Daniel C.; Orlik, Peter
2000
Topology of random 2-complexes. Zbl 1237.55009
Cohen, D.; Costa, A.; Farber, M.; Kappeler, T.
2012
Nonresonance conditions for arrangements. Zbl 1054.32016
Cohen, Daniel C.; Dimca, Alexandru; Orlik, Peter
2003
Homology of iterated semidirect products of free groups. Zbl 0908.20033
Cohen, Daniel C.; Suciu, Alexander I.
1998
How should control theory be used to calculate a time-consistent government policy? Zbl 0657.90021
Cohen, Daniel; Michel, Philippe
1988
Motion planning in tori. Zbl 1196.55021
Cohen, Daniel C.; Pruidze, Goderdzi
2008
Growth and human capital: good data, good results. Zbl 1157.91406
Cohen, Daniel; Soto, Marcelo
2007
Monodromy of fiber-type arrangements and orbit configuration spaces. Zbl 1018.20032
Cohen, Daniel C.
2001
Topological complexity of the Klein bottle. Zbl 1400.55001
Cohen, Daniel C.; Vandembroucq, Lucile
2017
The Chen groups of the pure braid group. Zbl 0833.20047
Cohen, Daniel C.; Suciu, Alexander I.
1995
Alexander invariants of complex hyperplane arrangements. Zbl 0945.20024
Cohen, Daniel C.; Suciu, Alexander I.
1999
Critical points and resonance of hyperplane arrangements. Zbl 1228.32028
Cohen, D.; Denham, G.; Falk, M.; Varchenko, A.
2011
The boundary manifold of a complex line arrangement. Zbl 1137.32013
Cohen, Daniel C.; Suciu, Alexander I.
2008
Torsion in Milnor fiber homology. Zbl 1030.32022
Cohen, Daniel C.; Denham, Graham; Suciu, Alexander I.
2003
Triples of arrangements and local systems. Zbl 1002.32019
Cohen, Daniel C.
2002
On the Künneth formula for intersection cohomology. Zbl 0765.57014
Cohen, Daniel C.; Goresky, Mark; Ji, Lizhen
1992
Cohomology and intersection cohomology of complex hyperplane arrangements. Zbl 0787.57014
Cohen, Daniel C.
1993
Topological complexity of basis-conjugating automorphism groups. Zbl 1250.20030
Cohen, Daniel C.; Pruidze, Goderdzi
2008
Topological complexity of collision-free motion planning on surfaces. Zbl 1218.55004
Cohen, Daniel C.; Farber, Michael
2011
Cohomology rings of almost-direct products of free groups. Zbl 1237.20048
Cohen, Daniel C.
2010
Resonance of basis-conjugating automorphism groups. Zbl 1183.20035
Cohen, Daniel C.
2009
Dickson polynomial permutations. Zbl 1211.11134
Cipu, Mihai; Cohen, D.
2008
Boundary manifolds of projective hypersurfaces. Zbl 1110.14036
Cohen, Daniel C.; Suciu, Alexander I.
2006
On representations and $$K$$-theory of the braid groups. Zbl 1066.20042
Adem, A.; Cohen, D.; Cohen, F. R.
2003
Lie algebras associated to fiber-type arrangements. Zbl 1094.17007
Cohen, Daniel C.; Cohen, Frederick R.; Xicoténcatl, Miguel
2003
Gauss-Manin connections for arrangements. I: Eigenvalues. Zbl 1046.32002
Cohen, Daniel C.; Orlik, Peter
2003
Some cyclic covers of complements of arrangements. Zbl 0994.32023
Cohen, Daniel C.; Orlik, Peter
2002
Algorithms for the workflow satisfiability problem engineered for counting constraints. Zbl 1354.90105
Cohen, D.; Crampton, J.; Gagarin, A.; Gutin, G.; Jones, M.
2016
Chen ranks and resonance. Zbl 1360.20021
Cohen, Daniel C.; Schenck, Henry K.
2015
Pure braid groups are not residually free. Zbl 1282.20035
Cohen, Daniel C.; Falk, Michael; Randell, Richard
2012
Centralizers of Lie algebras associated to descending central series of certain poly-free groups. Zbl 1135.20025
Cohen, Daniel C.; Cohen, Frederick R.; Prassidis, Stratos
2007
Gauss-Manin connections for arrangements. II: Nonresonant weights. Zbl 1078.32018
Cohen, Daniel C.; Orlik, Peter
2005
Topological complexity of classical configuration spaces and related objects. Zbl 1409.55003
Cohen, Daniel C.
2018
Morse inequalities for arrangements. Zbl 1002.52016
Cohen, Daniel C.
1998
Discriminantal bundles, arrangement groups, and subdirect products of free groups. Zbl 07270583
Cohen, Daniel C.; Falk, Michael J.; Randell, Richard C.
2020
Motion planning in connected sums of real projective spaces. Zbl 1419.55019
Cohen, Daniel C.; Vandembroucq, Lucile
2019
Automorphism groups of some pure braid groups. Zbl 1275.20031
Cohen, Daniel C.
2012
Vanishing products of one-forms and critical points of master functions. Zbl 1260.32007
Cohen, Daniel C.; Denham, Graham; Falk, Michael; Varchenko, Alexander
2012
Stratified Morse theory in arrangements. Zbl 1119.32013
Cohen, Daniel C.; Orlik, Peter
2006
Gauss-Manin connections for arrangements. IV: Nonresonant eigenvalues. Zbl 1103.32014
Cohen, Daniel C.; Orlik, Peter
2006
Gauss-Manin connections for arrangements. III: Formal connections. Zbl 1087.32014
Cohen, Daniel C.; Orlik, Peter
2005
Resonant local systems on complements of discriminantal arrangements and $$\mathfrak{sl}_2$$ representations. Zbl 1094.32008
Cohen, Daniel C.; Varchenko, Alexander N.
2003
Driven chaotic mesoscopic systems, dissipation and decoherence. Zbl 1057.70013
Cohen, D.
2002
On the cohomology of discriminantal arrangements and Orlik-Solomon algebras. Zbl 0978.32028
Cohen, Daniel C.
2000
Tests of the ”convergence hypothesis”: Some further results. Zbl 1038.91528
Cohen, Daniel
1996
Discriminantal bundles, arrangement groups, and subdirect products of free groups. Zbl 07270583
Cohen, Daniel C.; Falk, Michael J.; Randell, Richard C.
2020
Motion planning in connected sums of real projective spaces. Zbl 1419.55019
Cohen, Daniel C.; Vandembroucq, Lucile
2019
Topological complexity of classical configuration spaces and related objects. Zbl 1409.55003
Cohen, Daniel C.
2018
Topological complexity of the Klein bottle. Zbl 1400.55001
Cohen, Daniel C.; Vandembroucq, Lucile
2017
Algorithms for the workflow satisfiability problem engineered for counting constraints. Zbl 1354.90105
Cohen, D.; Crampton, J.; Gagarin, A.; Gutin, G.; Jones, M.
2016
Chen ranks and resonance. Zbl 1360.20021
Cohen, Daniel C.; Schenck, Henry K.
2015
Topology of random 2-complexes. Zbl 1237.55009
Cohen, D.; Costa, A.; Farber, M.; Kappeler, T.
2012
Pure braid groups are not residually free. Zbl 1282.20035
Cohen, Daniel C.; Falk, Michael; Randell, Richard
2012
Automorphism groups of some pure braid groups. Zbl 1275.20031
Cohen, Daniel C.
2012
Vanishing products of one-forms and critical points of master functions. Zbl 1260.32007
Cohen, Daniel C.; Denham, Graham; Falk, Michael; Varchenko, Alexander
2012
Critical points and resonance of hyperplane arrangements. Zbl 1228.32028
Cohen, D.; Denham, G.; Falk, M.; Varchenko, A.
2011
Topological complexity of collision-free motion planning on surfaces. Zbl 1218.55004
Cohen, Daniel C.; Farber, Michael
2011
Cohomology rings of almost-direct products of free groups. Zbl 1237.20048
Cohen, Daniel C.
2010
Resonance of basis-conjugating automorphism groups. Zbl 1183.20035
Cohen, Daniel C.
2009
Motion planning in tori. Zbl 1196.55021
Cohen, Daniel C.; Pruidze, Goderdzi
2008
The boundary manifold of a complex line arrangement. Zbl 1137.32013
Cohen, Daniel C.; Suciu, Alexander I.
2008
Topological complexity of basis-conjugating automorphism groups. Zbl 1250.20030
Cohen, Daniel C.; Pruidze, Goderdzi
2008
Dickson polynomial permutations. Zbl 1211.11134
Cipu, Mihai; Cohen, D.
2008
Growth and human capital: good data, good results. Zbl 1157.91406
Cohen, Daniel; Soto, Marcelo
2007
Centralizers of Lie algebras associated to descending central series of certain poly-free groups. Zbl 1135.20025
Cohen, Daniel C.; Cohen, Frederick R.; Prassidis, Stratos
2007
Boundary manifolds of projective hypersurfaces. Zbl 1110.14036
Cohen, Daniel C.; Suciu, Alexander I.
2006
Stratified Morse theory in arrangements. Zbl 1119.32013
Cohen, Daniel C.; Orlik, Peter
2006
Gauss-Manin connections for arrangements. IV: Nonresonant eigenvalues. Zbl 1103.32014
Cohen, Daniel C.; Orlik, Peter
2006
Numerical energy conservation for multi-frequency oscillatory differential equations. Zbl 1083.65117
Cohen, D.; Hairer, E.; Lubich, Ch.
2005
Gauss-Manin connections for arrangements. II: Nonresonant weights. Zbl 1078.32018
Cohen, Daniel C.; Orlik, Peter
2005
Gauss-Manin connections for arrangements. III: Formal connections. Zbl 1087.32014
Cohen, Daniel C.; Orlik, Peter
2005
Nonresonance conditions for arrangements. Zbl 1054.32016
Cohen, Daniel C.; Dimca, Alexandru; Orlik, Peter
2003
Torsion in Milnor fiber homology. Zbl 1030.32022
Cohen, Daniel C.; Denham, Graham; Suciu, Alexander I.
2003
On representations and $$K$$-theory of the braid groups. Zbl 1066.20042
Adem, A.; Cohen, D.; Cohen, F. R.
2003
Lie algebras associated to fiber-type arrangements. Zbl 1094.17007
Cohen, Daniel C.; Cohen, Frederick R.; Xicoténcatl, Miguel
2003
Gauss-Manin connections for arrangements. I: Eigenvalues. Zbl 1046.32002
Cohen, Daniel C.; Orlik, Peter
2003
Resonant local systems on complements of discriminantal arrangements and $$\mathfrak{sl}_2$$ representations. Zbl 1094.32008
Cohen, Daniel C.; Varchenko, Alexander N.
2003
Triples of arrangements and local systems. Zbl 1002.32019
Cohen, Daniel C.
2002
Some cyclic covers of complements of arrangements. Zbl 0994.32023
Cohen, Daniel C.; Orlik, Peter
2002
Driven chaotic mesoscopic systems, dissipation and decoherence. Zbl 1057.70013
Cohen, D.
2002
Monodromy of fiber-type arrangements and orbit configuration spaces. Zbl 1018.20032
Cohen, Daniel C.
2001
Arrangements and local systems. Zbl 0971.32012
Cohen, Daniel C.; Orlik, Peter
2000
On the cohomology of discriminantal arrangements and Orlik-Solomon algebras. Zbl 0978.32028
Cohen, Daniel C.
2000
Characteristic varieties of arrangements. Zbl 0963.32018
Cohen, Daniel C.; Suciu, Alexander I.
1999
Alexander invariants of complex hyperplane arrangements. Zbl 0945.20024
Cohen, Daniel C.; Suciu, Alexander I.
1999
Homology of iterated semidirect products of free groups. Zbl 0908.20033
Cohen, Daniel C.; Suciu, Alexander I.
1998
Morse inequalities for arrangements. Zbl 1002.52016
Cohen, Daniel C.
1998
The braid monodromy of plane algebraic curves and hyperplane arrangements. Zbl 0959.52018
Cohen, Daniel C.; Suciu, Alexander I.
1997
Tests of the ”convergence hypothesis”: Some further results. Zbl 1038.91528
Cohen, Daniel
1996
On Milnor fibrations of arrangements. Zbl 0814.32007
Cohen, Daniel C.; Suciu, Alexander I.
1995
The Chen groups of the pure braid group. Zbl 0833.20047
Cohen, Daniel C.; Suciu, Alexander I.
1995
Cohomology and intersection cohomology of complex hyperplane arrangements. Zbl 0787.57014
Cohen, Daniel C.
1993
On the Künneth formula for intersection cohomology. Zbl 0765.57014
Cohen, Daniel C.; Goresky, Mark; Ji, Lizhen
1992
How should control theory be used to calculate a time-consistent government policy? Zbl 0657.90021
Cohen, Daniel; Michel, Philippe
1988
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#### Cited by 301 Authors

 24 Suciu, Alexander I. 20 Cohen, Daniel C. 18 Dimca, Alexandru 14 Farber, Michael S. 12 Yoshinaga, Masahiko 11 Costa, Armindo 11 Denham, Graham 9 Wang, Bin 8 Papadima, Ștefan 8 Wu, Xinyuan 7 Artal Bartolo, Enrique 7 Cogolludo Agustín, José Ignacio 6 Cohen, Frederick Ronald 6 Falk, Michael J. 6 Hairer, Ernst 6 Salvetti, Mario 5 Grant, Mark 5 Schenck, Hal 5 Teicher, Mina 4 Bailet, Pauline 4 Budur, Nero 4 Callegaro, Filippo 4 Gonzalez, Jesus 4 Guerville-Ballé, Benoît 4 Liu, Yongqiang 4 Lubich, Christian 4 Maxim, Laurentiu G. 4 Settepanella, Simona 4 Sticlaru, Gabriel 3 Aronshtam, Lior 3 Friedman, Greg 3 Kappeler, Thomas 3 Kawahara, Yukihito 3 Libgober, Anatoly S. 3 Linial, Nathan 3 Marco-Buzunáriz, Miguel A. 3 Nazir, Shaheen 3 Orlik, Peter 3 Recio-Mitter, David 3 Saito, Morihiko 3 Wang, He 3 Williams, Kristopher 3 Wirl, Franz 3 Yuzvinsky, Sergey 2 Adem, Alejandro 2 Ambler, Steve 2 Amram, Meirav 2 Bardakov, Valeriĭ Georgievich 2 Bellingeri, Paolo 2 Brasselet, Jean-Paul 2 Brociner, Andrew 2 Cadavid-Aguilar, Natalia 2 Cellini, Roberto 2 Cordovil, Raul 2 Crespo Cuaresma, Jesús 2 Davis, Donald M. 2 Dranishnikov, Alexander Nikolaevich 2 Eliyahu, Meital 2 Gaiffi, Giovanni 2 Garber, David 2 Gundert, Anna 2 Gutin, Gregory Z. 2 Hiraguchi, Ryoji 2 Hou, Xiang-Dong 2 Huh, June 2 Kahle, Matthew 2 Lambertini, Luca 2 Levine, Paul 2 Lupton, Gregory M. 2 Măcinic, Daniela Anca 2 Massey, David Bradley 2 Matei, Daniel 2 McCammond, Jon 2 McClure, James E. 2 Meier, John 2 Meng, Fanwei 2 Mescher, Stephan 2 Oprea, John F. 2 Randell, Richard C. 2 Schulze, Mathias 2 Torielli, Michele 2 Vandembroucq, Lucile 2 Viu-Sos, Juan 2 Wagner, Uli 2 Walther, Uli 2 Xia, Jianlin 2 Xicoténcatl, Miguel A. 2 Yang, Hongli 2 Ye, Fei 1 Abou-Kandil, Hisham 1 Adiprasito, Karim Alexander 1 Adler, Robert Joseph 1 Aghion, Philippe 1 Aguilar Aguilar, Rodolfo 1 Ahsan, Humna 1 Álvarez López, Jesús A. 1 Alvarez, Victor 1 Amend, Nils 1 Aomoto, Kazuhiko 1 Arcalean, Calin ...and 201 more Authors
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#### Cited in 116 Serials

 22 Topology and its Applications 14 Journal of Economic Dynamics & Control 10 Advances in Mathematics 10 Proceedings of the American Mathematical Society 10 Algebraic & Geometric Topology 9 Transactions of the American Mathematical Society 7 Discrete & Computational Geometry 7 European Journal of Mathematics 6 Advances in Applied Mathematics 5 Annales de l’Institut Fourier 5 Journal of Pure and Applied Algebra 5 Mathematische Zeitschrift 5 Geometry & Topology 5 Journal of Economic Growth 5 Journal of Topology and Analysis 4 BIT 4 Mathematische Annalen 4 Finite Fields and their Applications 3 Calcolo 3 Compositio Mathematica 3 Geometriae Dedicata 3 Journal of Algebra 3 Random Structures & Algorithms 3 Economics Letters 3 Numerical Algorithms 3 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 3 Selecta Mathematica. New Series 3 Journal of Singularities 2 Israel Journal of Mathematics 2 Mathematical Proceedings of the Cambridge Philosophical Society 2 Duke Mathematical Journal 2 Journal of Computational and Applied Mathematics 2 Kodai Mathematical Journal 2 Manuscripta Mathematica 2 Numerische Mathematik 2 European Journal of Combinatorics 2 Journal of Economics 2 Forum Mathematicum 2 Journal of Knot Theory and its Ramifications 2 Experimental Mathematics 2 Journal of Algebraic Combinatorics 2 Communications in Contemporary Mathematics 2 Journal of the Institute of Mathematics of Jussieu 2 Oberwolfach Reports 2 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 1 Archive for Rational Mechanics and Analysis 1 Bulletin of the Australian Mathematical Society 1 Communications in Algebra 1 Information Processing Letters 1 Journal of Statistical Physics 1 Nuclear Physics. B 1 Arkiv för Matematik 1 Chaos, Solitons and Fractals 1 Annales Scientifiques de l’École Normale Supérieure. Quatrième Série 1 Applied Mathematics and Computation 1 Bulletin of the London Mathematical Society 1 Canadian Journal of Mathematics 1 Inventiones Mathematicae 1 Journal of Mathematical Economics 1 Michigan Mathematical Journal 1 Monatshefte für Mathematik 1 Nagoya Mathematical Journal 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Tohoku Mathematical Journal. Second Series 1 Tokyo Journal of Mathematics 1 Mathematical Social Sciences 1 Annals of Global Analysis and Geometry 1 Bulletin of the Iranian Mathematical Society 1 Physica D 1 Applied Numerical Mathematics 1 Graphs and Combinatorics 1 Journal of Symbolic Computation 1 Revista Matemática Iberoamericana 1 Publicacions Matemàtiques 1 Journal of Scientific Computing 1 Science in China. Series A 1 Sugaku Expositions 1 The Annals of Applied Probability 1 International Journal of Algebra and Computation 1 Computer Science in Economics and Management 1 European Journal of Operational Research 1 International Journal of Computer Mathematics 1 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 1 Indagationes Mathematicae. New Series 1 Applicable Algebra in Engineering, Communication and Computing 1 Topology Proceedings 1 Annales Mathématiques Blaise Pascal 1 Computational and Applied Mathematics 1 The New York Journal of Mathematics 1 Annals of Mathematics and Artificial Intelligence 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Documenta Mathematica 1 Vietnam Journal of Mathematics 1 Annals of Combinatorics 1 Annals of Mathematics. Second Series 1 Natural Resource Modeling 1 Journal of the European Mathematical Society (JEMS) 1 International Game Theory Review 1 Dynamical Systems 1 Foundations of Computational Mathematics ...and 16 more Serials
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#### Cited in 38 Fields

 98 Several complex variables and analytic spaces (32-XX) 92 Algebraic topology (55-XX) 77 Convex and discrete geometry (52-XX) 74 Algebraic geometry (14-XX) 63 Group theory and generalizations (20-XX) 48 Manifolds and cell complexes (57-XX) 35 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 33 Combinatorics (05-XX) 23 Numerical analysis (65-XX) 19 Computer science (68-XX) 12 Associative rings and algebras (16-XX) 11 Ordinary differential equations (34-XX) 11 Probability theory and stochastic processes (60-XX) 10 Dynamical systems and ergodic theory (37-XX) 8 Commutative algebra (13-XX) 6 Number theory (11-XX) 6 Nonassociative rings and algebras (17-XX) 6 Global analysis, analysis on manifolds (58-XX) 6 Systems theory; control (93-XX) 5 Mechanics of particles and systems (70-XX) 3 Topological groups, Lie groups (22-XX) 3 Special functions (33-XX) 3 Partial differential equations (35-XX) 3 Differential geometry (53-XX) 3 Operations research, mathematical programming (90-XX) 2 General and overarching topics; collections (00-XX) 2 Calculus of variations and optimal control; optimization (49-XX) 2 Statistics (62-XX) 2 Quantum theory (81-XX) 2 Statistical mechanics, structure of matter (82-XX) 2 Information and communication theory, circuits (94-XX) 1 Linear and multilinear algebra; matrix theory (15-XX) 1 $$K$$-theory (19-XX) 1 Difference and functional equations (39-XX) 1 Geometry (51-XX) 1 General topology (54-XX) 1 Optics, electromagnetic theory (78-XX) 1 Biology and other natural sciences (92-XX)