Contents

# Contents

## Idea

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### For relativistc fermions

In the relativistic Dirac equation: Thaller 92, Thm. 3.10, cf. (1.26)

### In solid state physics

Under the expected K-theory classification of topological phases of matter, time-reversal symmetry refers to that sector of twisted equivariant K-theory which is KR-theory, where the $\mathbb{Z}/2$ $\simeq \{\mathrm{E}, T\}$ acts

and

## References

### In solid state physics

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(For the moment see the references at topological insulator etc.)

Last revised on July 13, 2022 at 18:06:17. See the history of this page for a list of all contributions to it.