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ADFGVX cipher and Morse code separation

02/22/2020 19:50:45 PM

ChaCha RNG with fewer rounds

02/22/2020 19:45:43 PM

Popcount: counting 1’s in a bit stream

02/21/2020 09:29:07 AM

A brief comment on hysteresis

02/20/2020 11:30:43 AM

Safe Harbor ain’t gonna cut it

02/20/2020 11:22:42 AM

Inverse congruence RNG

02/19/2020 10:03:44 AM

A better adaptive Runge-Kutta method

02/19/2020 09:08:38 AM

How to estimate ODE solver error

02/19/2020 09:05:10 AM

Trapezoid rule and Romberg integration

02/18/2020 13:06:13 PM

Python and the Tell-Tale Heart

02/17/2020 21:53:12 PM

Why HIPAA matters even if you’re not a “covered entity”

02/17/2020 11:05:37 AM

Scaling and memoization

02/16/2020 16:33:42 PM

Lobatto integration

02/15/2020 22:11:40 PM

Runge-Kutta methods and Butcher tableau

02/13/2020 11:48:40 AM

Plotting complex functions

02/11/2020 21:53:24 PM

The orbit that put men on the moon

02/08/2020 09:54:13 AM

Behold! The Brusselator!

02/07/2020 22:04:28 PM

TestU01 small crush test suite

02/06/2020 16:02:50 PM

DIEHARDER test suite

02/06/2020 15:55:08 PM

Using PractRand to test an RNG

02/05/2020 20:29:08 PM

Leap seconds

02/05/2020 09:42:50 AM

Testing entropy extractor with NIST STS

02/04/2020 15:31:25 PM

Odd numbers in Pascal’s triangle

02/04/2020 09:14:48 AM

Stiff differential equations

02/02/2020 15:25:21 PM

Mittag-Leffler transform

01/31/2020 00:26:02 AM

Updated pitch calculator

01/29/2020 10:18:43 AM

Generalization of power polynomials

01/28/2020 07:25:19 AM

A different view of the Lorenz system

01/26/2020 12:42:10 PM

ODE bifurcation example

01/22/2020 19:37:07 PM

Software metric outliers

01/21/2020 11:28:36 AM

Scaling up and down

01/20/2020 10:31:09 AM

Cobweb plots

01/19/2020 15:54:50 PM

CCPA and expert determination

01/18/2020 15:38:55 PM

Variation on cosine fixed point

01/18/2020 14:33:40 PM

Stable and unstable recurrence relations

01/17/2020 08:28:09 AM

Recurrence relations and Python

01/17/2020 08:27:50 AM

Reminder of complexity

01/16/2020 10:44:54 AM

Logistic trajectories

01/16/2020 08:11:21 AM

Analogies between Weierstrass functions and trig functions

01/15/2020 15:03:15 PM

More efficient way to sum a list comprehension

01/15/2020 11:17:16 AM

On this day

01/14/2020 08:53:24 AM

Logistic bifurcation diagram in detail

01/11/2020 18:36:35 PM

Technology à la carte

01/07/2020 08:46:17 AM

Estimating the proportion of smooth numbers

01/06/2020 15:08:17 PM

Sufficient statistic paradox

01/04/2020 14:04:57 PM

Number of forms of a finite field

01/03/2020 22:22:53 PM

Area of sinc and jinc function lobes

12/31/2019 10:23:05 AM

Doing a database join with CSV files

12/31/2019 08:00:15 AM

Exporting Excel files to CSV with in2csv

12/30/2019 13:29:39 PM

Minimizing context switching between shell and Python

12/30/2019 09:05:25 AM

A new take on the birthday problem

12/28/2019 16:45:21 PM

Driven Van der Pol oscillators

12/26/2019 12:15:38 PM

Calculating the period of Van der Pol oscillators

12/26/2019 07:35:10 AM

Master / Apprentice relationship graph in Star Wars

12/24/2019 12:58:14 PM

Top math posts of 2019

12/23/2019 08:00:51 AM

Solving Van der Pol equation with ivp_solve

12/22/2019 18:57:16 PM

Exponential Christmas wreath

12/20/2019 09:00:40 AM

Convergence rate of random walk on integers mod p

12/17/2019 09:58:57 AM

Top privacy-related posts of 2019

12/16/2019 17:00:26 PM

Stability criteria in a nutshell

12/15/2019 14:00:57 PM

Random sample overlap

12/13/2019 08:26:38 AM

Advantages of redundant coordinates

12/11/2019 10:21:41 AM

Determining fundamental frequency

12/10/2019 17:52:30 PM

Top command line posts of 2019

12/10/2019 07:32:58 AM

Illustrating Cayley-Hamilton with Python

12/09/2019 07:00:38 AM

Why can’t grep find negative numbers?

12/07/2019 07:35:46 AM

Why doesn’t grep work?

12/05/2019 10:06:59 AM

Top cryptography posts of 2019

12/04/2019 13:50:23 PM

New RSA factoring challenge solved

12/03/2019 19:16:50 PM

Distracted by the hard part

12/03/2019 07:01:21 AM

Data Science and Star Science

11/30/2019 23:11:53 PM

Near zeros of zeta

11/29/2019 11:39:09 AM

Fractal via bit twiddling

11/26/2019 08:00:42 AM

Stochastic rounding and privacy

11/25/2019 12:58:36 PM

Set theory at the command line

11/24/2019 16:29:21 PM

Quantum mechanics via quantum computing

11/20/2019 22:07:28 PM

Crinkle Crankle Calculus

11/19/2019 13:15:54 PM

Rook graphs and Paley graphs

11/19/2019 11:56:17 AM

NP vs small P

11/18/2019 20:38:38 PM

Inverse trig function implementations

11/18/2019 14:02:47 PM

arctan( k tan(x) )

11/18/2019 09:05:12 AM

Orbital resonance in Neptune’s moons

11/17/2019 17:35:13 PM

The hardest logarithm to compute

11/16/2019 21:10:23 PM

Hand-drawn Graphviz diagrams

11/13/2019 14:57:28 PM

Permutation distance

11/13/2019 12:29:24 PM

Anagram frequency

11/13/2019 08:00:36 AM

A note to new readers

11/12/2019 09:34:35 AM

Just evaluating a polynomial: how hard could it be?

11/12/2019 07:34:10 AM

Floating point oddity

11/11/2019 18:16:04 PM

Mathematical killer apps

11/11/2019 10:22:37 AM

Optimization, Dominoes, and Frankenstein

11/07/2019 10:28:35 AM

More on attacking combination locks

11/05/2019 13:04:24 PM

Summing an array of floating point numbers

11/05/2019 09:52:45 AM

Any number can start a factorial

11/02/2019 10:33:11 AM

Arbitrary precision is not a panacea

11/01/2019 12:04:09 PM

Computed IDs and privacy implications

10/31/2019 20:56:09 PM

Generating Python code from SymPy

10/31/2019 11:18:08 AM

A simple unsolved problem

10/30/2019 22:30:21 PM

Higher order Newton-like methods for root finding

10/30/2019 11:22:50 AM

Formatting numbers at the command line

10/30/2019 07:21:45 AM