Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contractions, inwardness, tool theorems   The paper is devoted to the fixed point theory in four aspects: of
contractions, nonexpansive mappings, generalized inward mappings, and of the
tool theorems. The manuscript was written about ten years ago.
  At first Nadler's concept of contraction for multivalued mappings is replaced
here by a more general, and yet elegant condition: for some $\alpha + \epsilon
<1$, and each $x \in X$ there exists a $y \in F(x)$ such that $d(F(y),y) \leq
\alpha d(y,x) \leq (\alpha + \epsilon) d(F(x),x)$}.
  For ``nonexpansive'' mappings we apply bead spaces that are more general than
uniformly convex spaces, and our requirements on mappings are weaker than
nonexpansivity in the sense of the Hausdorff distance.
  In the last, third section the Caristi theorem is replaced by more
specialized ``tools'', and we apply them to obtain stronger fixed point
theorems on generalized inward mappings. In particular, if for each $x \in X$ a
nearest point of $F(x)$ belongs to the generalized inward set, then the values
of $F$ need not to be closed.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga