John D. Cook johndcook.com

Interpolation instability

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Drazin pseudoinverse

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Effective graph resistance

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Multiplying a matrix by its transpose

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A bit-twiddling marvel

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Matrices of Matrices

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Probability of rolling a Yahtzee

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Trinomial Coefficients and Kings

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Riff on an integration bee integral

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Another little chess puzzle

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Multiplying by quaternions on the left and right

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Embeddings, Projections, and Inverses

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Alternative exp and log notation

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Decimal Separator and Internationalization

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A crowded little chess puzzle

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Formulating eight queens as a SAT problem

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Special solutions to the eight queens problem

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The non-attacking bishops problem

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This morning I wrote about the frequencies of names for popes and kings\. This involved sorting strings with Roman numerals since it’s common for popes and kings to have Roman...

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Frequency of names of English monarchs

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