Today we finished the proof of the IKW Theorem. We also showed fhe Kabanets-Impagliazzo Theorem: derandomizing Arithmetic Circuit Identity Testing implies $NEXP$ not in $P/poly$ or Permanent not in $AlgP/poly$ or both.

We then moved on to the definition of expander graphs, the definition of strongly explicit graph families, and saw the Lubotsky-Phillips-Sarnak and Margulis-Gabber-Galil expander families.

## Thursday, April 9, 2009

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