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4 votes

Karoubi versus Kasparov K-theory

About 15 years ago I used Karoubi's description of $K$-theory to solve prove some cutting and pasting formula for the index families of elliptic problems. To do so I needed rephrase Karoubi …
Liviu Nicolaescu's user avatar
18 votes

What are the "correct" conventions for defining Clifford algebras?

To my mind, it has to do with p.d.e.'s and to your background, geometry or physics. Let me explain. $\newcommand{\pa}{\partial}$ Fix $\epsilon=\pm 1$. Define the Clifford algebra using the $\ep …
Liviu Nicolaescu's user avatar
4 votes

Weitzenböck Identity for $\Delta_{\bar{\partial}_E}$

The answer for both questions 1, 2 is yes, the metric connection in Proposition 9.1.27 is the Levi-Civita induced connection if the background manifold is Kahler. When $X$ is only a Hermitia …
Liviu Nicolaescu's user avatar