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John D. Cook
johndcook.com
John D. Cook
·
39w
39 weeks ago
Tetrahedral analog of the Pythagorean theorem
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John D. Cook
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39w
39 weeks ago
The anti-Smith chart
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Actions for The anti-Smith chart
John D. Cook
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39w
39 weeks ago
Impedance and Trianglular Numbers
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Actions for Impedance and Trianglular Numbers
John D. Cook
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39w
39 weeks ago
Cross ratio
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Actions for Cross ratio
John D. Cook
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39w
39 weeks ago
Text case changes the size of QR codes
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Actions for Text case changes the size of QR codes
John D. Cook
·
39w
39 weeks ago
An ancient generalization of the Pythagorean theorem
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John D. Cook
·
39w
39 weeks ago
An ancient generalization of the Pythagorean theorem
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John D. Cook
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39w
39 weeks ago
Mentally estimating log base 2
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Actions for Mentally estimating log base 2
John D. Cook
·
39w
39 weeks ago
Physical Keys and Encryption Keys
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Actions for Physical Keys and Encryption Keys
John D. Cook
·
40w
40 weeks ago
Freshman’s dream
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Actions for Freshman’s dream
John D. Cook
·
40w
40 weeks ago
Why and how Bitcoin uses Merkle trees
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John D. Cook
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40w
40 weeks ago
How blocks are chained in a blockchain
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John D. Cook
·
40w
40 weeks ago
987654321 / 123456789
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Actions for 987654321 / 123456789
John D. Cook
·
40w
40 weeks ago
Spacing the circles on the Smith chart
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Actions for Spacing the circles on the Smith chart
John D. Cook
·
40w
40 weeks ago
The Smith chart
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Actions for The Smith chart
John D. Cook
·
40w
40 weeks ago
Generating random points in Colorado
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Actions for Generating random points in Colorado
John D. Cook
·
40w
40 weeks ago
Random spherical coordinates
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Actions for Random spherical coordinates
John D. Cook
·
41w
41 weeks ago
Distribution of correlation
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Actions for Distribution of correlation
John D. Cook
·
41w
41 weeks ago
Distribution of coordinates on a sphere
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Actions for Distribution of coordinates on a sphere
John D. Cook
·
41w
41 weeks ago
ODE to Fisher’s transform
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Actions for ODE to Fisher’s transform
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