Brzdȩk, Janusz On solutions of a generalization of the Reynolds functional equation. (English) Zbl 1163.39013 Demonstr. Math. 41, No. 4, 859-868 (2008). Reviewer: Maryam Amyari (Mashhad) MSC: 39B52 × Cite Format Result Cite Review PDF
Brzdȩk, J. On approximately microperiodic mappings. (English) Zbl 1164.39012 Acta Math. Hung. 117, No. 1-2, 179-186 (2007). Reviewer: Tomasz Natkaniec (Gdańsk) MSC: 39B62 39B52 26A30 28A20 × Cite Format Result Cite Review PDF Full Text: DOI
Brzdȩk, J. A generalization of addition formulae. (English) Zbl 1050.39031 Acta Math. Hung. 101, No. 4, 281-291 (2003). MSC: 39B52 20N02 × Cite Format Result Cite Review PDF Full Text: DOI
Brzdȩk, Janusz On functions which are almost additive modulo a subgroup. (English) Zbl 0985.39019 Glas. Mat., III. Ser. 36, No. 1, 1-9 (2001). Reviewer: Pavel Talpalaru (Iaşi) MSC: 39B52 × Cite Format Result Cite Review PDF
Brzdek, Janusz On orthogonally exponential and orthogonally additive mappings. (English) Zbl 0870.39011 Proc. Am. Math. Soc. 125, No. 7, 2127-2132 (1997). MSC: 39B52 × Cite Format Result Cite Review PDF Full Text: DOI
Brzdȩk, J. On the Cauchy difference on normed spaces. (English) Zbl 0864.39009 Abh. Math. Semin. Univ. Hamb. 66, 143-150 (1996). Reviewer: C.Alsina (Barcelona) MSC: 39B52 × Cite Format Result Cite Review PDF Full Text: DOI
Brzdȩk, Janusz The Cauchy and Jensen differences on semigroups. (English) Zbl 0862.39011 Publ. Math. Debr. 48, No. 1-2, 117-136 (1996). Reviewer: B.Choczewski (Kraków) MSC: 39B52 × Cite Format Result Cite Review PDF
Brzdȩk, J. On functions satisfying some inequalities. (English) Zbl 0815.39011 Abh. Math. Semin. Univ. Hamb. 63, 277-281 (1993). Reviewer: M.C.Zdun (Kraków) MSC: 39B72 28A20 × Cite Format Result Cite Review PDF Full Text: DOI
Brzdȩk, Janusz On the Cauchy difference. (English) Zbl 0780.39008 Glas. Mat., III. Ser. 27, No. 2, 263-269 (1992). Reviewer: J.Schwaiger (Graz) MSC: 39B52 × Cite Format Result Cite Review PDF