# Article

 Title: Homotopy diagrams of algebras (English) Author: Markl, Martin Language: English Journal: Proceedings of the 21st Winter School "Geometry and Physics" Volume: Issue: 2001 Year: Pages: [161]-180 . Category: math . Summary: The paper is concerned with homotopy concepts in the category of chain complexes. It is part of the author's program to translate [{\it J. M. Boardman} and {\it R. M. Vogt}, Homotopy invariant algebraic structures on topological spaces, Lect. Notes Math. 347, Springer-Verlag (1973; Zbl 0285.55012)] from topology to algebra.\par In topology the notion of operad extracts the essential algebraic information contained in the following example (endomorphism operad).\par The endomorphism operad ${\cal E}_X$ of a based space $X$ consists of the family ${\cal E}_X(j)$ $(j\ge 0)$ of spaces of based maps $X^j\to X$, together with the collection of continuous maps $$\gamma:{\cal E}_X(k)\times{\cal E}_X(j_1)\times\cdots\times{\cal E}_X(j_k)\to{\cal E}_X(j)$$ given by the formula $$\gamma(f; g_1,\dots, g_k)= f(g_1\times\cdots\times g_k),$$ where $k,j_1,\dots, j_k,j$ are such that $j= \sum^k_{s=1} j_s$.\par Operads have proved to be a convenient tool to investigate, for example! (English) MSC: 12H05 MSC: 18G55 MSC: 55P48 MSC: 55U15 MSC: 55U35 idZBL: Zbl 1024.55012 idMR: MR1972432 . Date available: 2009-07-14T08:29:29Z Last updated: 2012-09-18 Stable URL: http://hdl.handle.net/10338.dmlcz/701787 .

## Files

Files Size Format View
WSGP_21-2001-1_13.pdf 1.459Mb application/pdf View/Open

Partner of