added pointer to:

- David D. Bleecker, Bernhelm Booß-Bavnbek:
*Index Theory with Applications to Mathematics and Physics*, International Press of Boston (2013) [ISBN:9781571462640, pdf]

briefly added some of the standard argument to the proof of the heat-kernel expression for the index of the Dirac operator here

(prompted by this PhysicsOverflow question).

]]>expanded at *index* the section *For Dirac operators* with a tad more details on the statement

- index-of-Dirac-operator = partition-function-of-susy-quantum-mechanics

I gave *index* an Idea-section.

In the course of this I created some stubby auxiliary entries, such as (in rapidly increasing order of stubbieness)

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