1 “... between intersection forms. Therefore the problem arises of computing the homotopy classes of maps...”

2 “... of pure mathematics and is also omnipresent in more applied parts of mathematics. Therefore students...”

3 “... vector bundles. The cohomology ring of a Grassmannian is therefore of interest in topology, differential...”

4 “... with the non-compact setting. The methods mostly involve elementary analytical techniques and are therefore...”

5 “... to the first lectures. Therefore this book may also serve as an introduction to the subject of nonpositively...”

6 “... matter. The text is therefore accessible not only to the professional mathematician but also...”

7 “... and are therefore introduced in the first chapter and emphasized throughout the text. This also conforms...”

8 “... the subject, to which it gives a perfect introduction. It is therefore suitable for both graduate students...”

9 “... as integrals. Therefore, the integrals and symmetries must be confronted head on, which leads to the definition...”

10 “... and therefore the selection of topics differs from that chosen in 2002. The following areas experienced...”

11 “... forgot to prove it. Therefore the world of mathematicians called it the Heawood Conjecture. In 1968...”

12 “... topological concepts. Therefore, it is essential to acquaint students with topo­ logical research methods...”

13

14 “... the most recent fixed-point methods and their applications. Our approach is therefore via triangu- tions...”

15 “... inherent in the geometry of non-positively curved manifolds. There is therefore a great deal to be said...”

16 “... and their constituents. This series on Cell Analysis is, therefore, aiming at providing the theoretical and practical...”

17 “... need not have a simply connected complement; therefore a Cantor set can be imbedded in 3-space...”

18 “..., to name but two), and are therefore essential: the theory of tensors (including covariant differentiation...”

19 “.... It consists of ten chapters, the first six of which are meant for beginners and are therefore suitable...”