Wordnet 3.0
NOUN (1)
1. 
 the branch of pure mathematics that deals only with the properties of a figure X that hold for every figure into which X can be transformed with a one-to-one correspondence that is continuous in both directions; 
[syn: topology, analysis situs]
WordNet (r) 3.0 (2006):
analysis situs
    n 1: the branch of pure mathematics that deals only with the
         properties of a figure X that hold for every figure into
         which X can be transformed with a one-to-one correspondence
         that is continuous in both directions [syn: topology,
         analysis situs]