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  3. John D. Cook Consulting Blog

John D. Cook Consulting Blog

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John D. Cook Consulting Blog

29.07.2025

How Ethereum EIP-55 added backward-compatible error checking

What can you do if you didn't include a check sum in an identifier then decide you want to go back and add one but don't want to break old IDs?

John D. Cook Consulting Blog

29.07.2025

Powers of 3 + √2

How to calculate large powers of 3 + √2 numerically with bc and symbolically with Mathematica. Conjecture regarding the integer and irrational parts.

John D. Cook Consulting Blog

30.07.2025

Counting sums of squares

For large N, about what proportion of numbers less than N are the sum of two squares

John D. Cook Consulting Blog

30.07.2025

Eigenvalues of the Laplacian on a square

Finding and ordering the eigenvalues of the Laplace operator on the unit square with zero boundary conditions.

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