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Timeline for Inverse of a small submatrix

Current License: CC BY-SA 3.0

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Apr 11, 2018 at 12:09 comment added John Smith When $| \cal I| \sim 1000$, the method seems efficient. But what if $| \cal I| \ll 1000$ ? In this example, $| \cal I| = 3 \ll 1000$.
Apr 11, 2018 at 11:58 history answered Carlo Beenakker CC BY-SA 3.0