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    STUDIA MATHEMATICA - Issue no. 2 / 2008  
         
  Article:   BOOK REVIEWS: S.V. EMELYANOV, S.K. KOROVIN, N.A. BOBYLEV, A.V. BULATOV, HOMOTOPY OF EXTREMAL PROBLEMS, WALTER DE GRUYTER, BERLIN - NEW YORK, 2007, 303 PP, ISBN 978-1-11-018942-1.

Authors:  CORNEL PINTEA.
 
       
         
  Abstract:  The idea of homotopy appears in many branches of mathematics such as algebraic topology, differential topology, nonlinear analysis, variational calculus etc. Its importance comes from the invariance of some powerful tools, such as the induced homomorphism at the level of various homology/cohomology groups, the degree, the Conley index etc., on corresponding homotopy classes of maps or homotopically deformed spaces.  
         
     
         
         
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