  We apply equivariant localization to supersymmetric quantum mechanics and
show that the partition function localizes on the instantons of the theory. Our
construction of equivariant cohomology for SUSY quantum mechanics is different
than the ones that already exist in the literature. A hidden bosonic symmetry
is made explicit and the supersymmetry is extended. New bosonic symmetry is the
square of the new fermionic symmetry. The D term is now the parameter of the
bosonic symmetry. This construction provides us with an equivariant complex
together with a Cartan differential and makes the use of localization principle
possible.
