zbMATH — the first resource for mathematics

Examples
Geometry Search for the term Geometry in any field. Queries are case-independent.
Funct* Wildcard queries are specified by * (e.g. functions, functorial, etc.). Otherwise the search is exact.
"Topological group" Phrases (multi-words) should be set in "straight quotation marks".
au: Bourbaki & ti: Algebra Search for author and title. The and-operator & is default and can be omitted.
Chebyshev | Tschebyscheff The or-operator | allows to search for Chebyshev or Tschebyscheff.
"Quasi* map*" py: 1989 The resulting documents have publication year 1989.
so: Eur* J* Mat* Soc* cc: 14 Search for publications in a particular source with a Mathematics Subject Classification code (cc) in 14.
"Partial diff* eq*" ! elliptic The not-operator ! eliminates all results containing the word elliptic.
dt: b & au: Hilbert The document type is set to books; alternatively: j for journal articles, a for book articles.
py: 2000-2015 cc: (94A | 11T) Number ranges are accepted. Terms can be grouped within (parentheses).
la: chinese Find documents in a given language. ISO 639-1 language codes can also be used.

Operators
a & b logic and
a | b logic or
!ab logic not
abc* right wildcard
"ab c" phrase
(ab c) parentheses
Fields
any anywhere an internal document identifier
au author, editor ai internal author identifier
ti title la language
so source ab review, abstract
py publication year rv reviewer
cc MSC code ut uncontrolled term
dt document type (j: journal article; b: book; a: book article)
The classification of the surfaces with parallel mean curvature vector in two-dimensional complex space forms. (English) Zbl 0997.53006
The paper contains the following new result: If a surface in 2 (4ρ) (= the complex projective plane endowed with the Fubini-Study metric of constant holomorphic sectional curvature 4ρ) has parallel mean curvature vector, then it is minimal or has constant Gaussian curvature. A new class of surfaces (in 2 and 2 (-4)) with parallel mean curvature vector which are not of constant Kähler angle are found.
Reviewer: A.Neagu (Iaşi)

MSC:
53A10Minimal surfaces, surfaces with prescribed mean curvature
49Q05Minimal surfaces (calculus of variations)
53C56Other complex differential geometry