Online LaTeX Equation Editor - create, integrate and download

6 days ago by mcherm

A website to enter LaTeX math equations and get back GIF images.

math
blogging
useful
LaTeX
6 days ago by mcherm

Meet Alex, the Russian Casino Hacker Who Makes Millions Targeting Slot Machines | WIRED

8 weeks ago by mcherm

Wired claims this man can reverse engineer the PRNGs in slot machines and make a profit. It's illegal in the US, but not everywhere.

hacking
via:HackerNews
random
math
8 weeks ago by mcherm

Mathematician Solves Computer Science Conjecture in Two Pages | Quanta Magazine

8 weeks ago by mcherm

For 30 years the brightest minds in computer science tried this easy-to-explain problem and failed. The proof is beautiful and incredibly short (1.5 pages written out carefully; abbreviated fits in a tweet).

math
computerscience
via:reddit
8 weeks ago by mcherm

Goodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem

11 weeks ago by mcherm

They figured out how to make perfect lenses!

history
math
invention
via:HackerNews
11 weeks ago by mcherm

Philosophical Books about Math? - math

june 2019 by mcherm

Some potential book recommendations.

via:reddit
personal_net
philosophy
math
philosophyOfMath
june 2019 by mcherm

CoCalc - Collaborative Calculation in the Cloud

april 2019 by mcherm

This appears to be tool for sharing a programming project online. It has history and allows shared development. Supports lots of stuff from LaTeX to Python to R to Scala. Nicely set up for running a course online.

via:HackerNews
useful
math
python
programming
april 2019 by mcherm

The Pavlov Strategy - LessWrong 2.0

january 2019 by mcherm

A different simple strategy that does well in TitForTat tournaments.

philosophy
TitForTat
math
january 2019 by mcherm

Quanta’s Year in Math and Computer Science (2018) | Quanta Magazine

december 2018 by mcherm

Several discoveries made this year (by surprisingly young researchers and one amateur).

math
computerscience
via:HackerNews
december 2018 by mcherm

My hobby: proof engineering | Stephan Boyer

december 2018 by mcherm

An article from someone who's hobby is doing mathematical proofs in coq. Excellent footnotes.

coq
math
proof
via:reddit
december 2018 by mcherm

History of the isomorphism between programs and proofs

december 2018 by mcherm

Dense reading, but to me quite fascinating.

math
computerscience
december 2018 by mcherm

The Search for the Largest Square Number - math

december 2018 by mcherm

Why is the search for the largest known prime number any different than the search for the largest known square number?

math
funny
via:reddit
december 2018 by mcherm

Let’s remove Quaternions from every 3D Engine (An Interactive Introduction to Rotors from Geometric Algebra)

december 2018 by mcherm

Bivectors - a different basis for thinking about operations like rotation in 3D.

math
geometry
via:HackerNews
december 2018 by mcherm

Leonardo da Vinci's tree rule may be explained by wind

december 2018 by mcherm

For some tree species, Leonardo noted, the cross-sectional area of a ranch before a fork is equal to the sum of the cross-sectional areas after the fork. The previous explanation is implausible; this author shows that constant resistance to wind forces could explain it.

LeonardoDaVinci
math
science
biology
via:HackerNews
december 2018 by mcherm

Get billions of digits of Pi from an incorrect formula

december 2018 by mcherm

An extremely readable paper proving a certain equation gives a number that matches Pi only for 46 billion digits. Really just plugging a big number into a limit.

math
via:reddit
december 2018 by mcherm

Bicycles For The Mind: The Slide Rule

october 2018 by mcherm

About slide rules, but ALSO mentions a Babylonian trick for multiplying using subtraction with just a few pre-computed results.

math
via:HackerNews
october 2018 by mcherm

Why is 196,884 = 196,883+1 so important? What is an explanation in everyday, simple terms? - Quora

september 2018 by mcherm

Nicely explained info about the monster group; unfortunately beyond my ability to fully understand.

math
via:reddit
september 2018 by mcherm

A study of musical scales by Ian Ring

august 2018 by mcherm

A mathematical view of musical scales. it is an interesting description but I have found others that I thought were more informative.

math
music
via:HackerNews
august 2018 by mcherm

What Did Ada Lovelace's Program Actually Do?

august 2018 by mcherm

A close look at the first program ever (by Ada Lovelace) including a bug (which might have been hers or the typesetter's). It calculated Bernoulli numbers.

history
AdaLovelace
programming
bug
via:HackerNews
math
august 2018 by mcherm

An integer formula for Fibonacci numbers

july 2018 by mcherm

A strange formula for fibonacci numbers.

math
via:HackerNews
july 2018 by mcherm

Why do we say a line has "infinite" points? - PhilosophyofMath

july 2018 by mcherm

An answer I feel fairly proud of.

math
mypostings
blogworthy
july 2018 by mcherm

What are the most interesting anecdotes about famous mathematicians? - math

may 2018 by mcherm

Some interesting anecdotes about mathematicians.

history
math
via:reddit
may 2018 by mcherm

What can be learned from the fact that √2+√3 ~ π

may 2018 by mcherm

A geometric interpretation of this approximation.

math
via:reddit
may 2018 by mcherm

The fifth hyperfactorial: 5⁵×4⁴×3³×2²×1¹=86400000 milliseconds is exactly 1 day | Hacker News

may 2018 by mcherm

1^1 + 2^2 + 3^3 + 4^4 + 5^5 = number of milliseconds in a day.

math
time
via:HackerNews
may 2018 by mcherm

The incredible palindromic hat-trick - math

may 2018 by mcherm

Any number can be expressed as the sum of 3 palindromes. This is true in every base except 2, which occasionally requires 4 palindromes.

math
via:reddit
may 2018 by mcherm

the Infinity Puzzle: a new kind of jigsaw puzzle | Nervous System blog

may 2018 by mcherm

It's equivalent to a Klein bottle.

personal_net
via:HackerNews
puzzles
math
topology
may 2018 by mcherm

Statistician Proves Gaussian Correlation Inequality | Quanta Magazine

april 2018 by mcherm

Older amateur mathematician proves well studied conjecture; simple tools with different approach; article summarizes the math.

math
via:HackerNews
history
april 2018 by mcherm

For mathematicians, = does not mean equality – Math ∩ Programming

april 2018 by mcherm

Programming languages often use "=" for assignment; mathematicians use it oddly too.

math
languagedesign
programming
via:HackerNews
april 2018 by mcherm

The Mathematics of 2048: Optimal Play with Markov Decision Processes

april 2018 by mcherm

Markof trees and the game 2048.

2048
math
gamedesign
april 2018 by mcherm

GitHub - philipl/pifs: πfs - the data-free filesystem!

march 2018 by mcherm

Store any value in Pi (assuming it is normal). [Metadata stored separately.]

funny
programming
math
via:reddit
march 2018 by mcherm

Counterintuitive Properties of High Dimensional Space - Lost in Spacetime

march 2018 by mcherm

Some interesting properties of multi-dimensional spheres, such as: "the volume increases up to about 5 dimensions, then decreases to near 0" or "most points are "near the equator" of a high-dimensional sphere".

math
geometry
via:HackerNews
march 2018 by mcherm

Einstein’s Boyhood Proof of the Pythagorean Theorem | The New Yorker

march 2018 by mcherm

A simple, elegant proof of the Pythagorean theorem which *may* be attributable to a young Albert Einstein.

math
via:reddit
AlbertEinstein
march 2018 by mcherm

How 4,000 Physicists Gave a Vegas Casino its Worst Week Ever

march 2018 by mcherm

It turns out physicists don't gamble much.

math
physics
story
via:HackerNews
march 2018 by mcherm

Mathematicians Crack the Cursed Curve | Quanta Magazine

march 2018 by mcherm

A new method can be used to find rational solutions to equations known to have only a finite number of rational solutions.

math
via:HackerNews
march 2018 by mcherm

Why Is It Taking 20 Minutes to Mine This Bitcoin Block?

february 2018 by mcherm

Average block time: 10 mins. But the expected time to mine the block currently being worked on is 20 mins.

math
bitcoin
via:HackerNews
february 2018 by mcherm

Fermat's Library | Drawing an elephant with four complex parameters annotated/explained version.

february 2018 by mcherm

Quoth von Neumann: "With four parameters I can fit an elephant, and with five I can make him wiggle his trunk." This paper demonstrates it.

math
physics
via:HackerNews
philosophyOfScience
february 2018 by mcherm

Content-Type: text/shitpost : I am a mathematician

february 2018 by mcherm

I am a mathematician (albeit not a professional one, nor a highly skilled one).

math
philosophyOfMath
MarkDominus
february 2018 by mcherm

The different types (not sizes!) of infinity

february 2018 by mcherm

Cardinals, Ordinals, Poles/Limits, Hyperreals -- all different types of "infinity".

math
set-theory
infinity
february 2018 by mcherm

Cool stuff to do for math club? - math

january 2018 by mcherm

Great list of fun math.

math
via:reddit
fun
january 2018 by mcherm

Random with care / fuzzy notepad

january 2018 by mcherm

Some details about random distributions. Includes picking a random direction and the interesting beta distribution.

math
programming
via:HackerNews
january 2018 by mcherm

Nefertiti, Confucius, Genghis Khan, and Charlemagne Are Almost Certainly on Your Family Tree

january 2018 by mcherm

Simple models say a common ancestor of everyone exists just about 600 years ago. Models that include conservative assumptions about isolation and inbreeding say EVERYONE 3600 years ago either had no descendants or is an ancestor of all living humans.

math
history
via:HackerNews
genetics
january 2018 by mcherm

My wife recently learned that some mathematicians have had funny hats, so she collected some pictures. - math

december 2017 by mcherm

Funny hats on ancient mathematicians.

math
fashion
via:reddit
december 2017 by mcherm

The Impossible Mathematics of the Real World - Issue 49: The Absurd - Nautilus

december 2017 by mcherm

A few cases in mathematics where things are not equal but are very, very close. Some are meaningful; others are not.

math
via:reddit
december 2017 by mcherm

Triangle of Power - New Notation for Logarithms

november 2017 by mcherm

A different notation to describe logarithms, exponents, and roots symmetrically.

math
via:reddit
november 2017 by mcherm

Shtetl-Optimized » Blog Archive » My Big Numbers talk at Festivaletteratura

october 2017 by mcherm

Scott Aaronson takes a new stab at playing the "name the biggest number" game.

bignumbers
math
ScottAaronson
october 2017 by mcherm

The Joy of Sexagesimal Floating-Point Arithmetic - Scientific American Blog Network

september 2017 by mcherm

The reason the Babylonians used base 60 is that they did division by multiplying by something conjugate and then correcting the order of magnitude (which they didn't write down).

math
via:HackerNews
history
september 2017 by mcherm

A more interesting algebra puzzle than typical. - math

september 2017 by mcherm

A good algebra problem for kids. "How many cats are n the box?"

math
puzzles
via:reddit
september 2017 by mcherm

Mathematicians Measure Infinities, and Find They're Equal - Scientific American

september 2017 by mcherm

Two infinities are proven equal in a surprising connection to "model theory".

math
set-theory
via:reddit
ScientificAmerican
september 2017 by mcherm

Number strings numerical sorting with multi-model database ArangoDB

september 2017 by mcherm

A representation for ANY size numbers whose lexographic sort is the same as the numeric sort (and that isn't overly wasteful of space).

math
algorithm
via:HackerNews
september 2017 by mcherm

Why a Dutch court stopped high school students from exchanging schools

august 2017 by mcherm

Lottery systems, optimal outcomes, and eliminating a reason for "strategic voting".

math
law
election
via:HackerNews
august 2017 by mcherm

TIL that Gödel's first incompleteness theorem doesn't apply to Euclid's postulates, making planar geometry a fully decidable system. - math

august 2017 by mcherm

Discussion of what the incompleteness theorem actually allows -- much of which is somewhat beyond me.

math
via:reddit
august 2017 by mcherm

The Kolmogorov option

august 2017 by mcherm

Scott Aaronson on why Kolmogorov was an amazing mathematician, and why ethical people may wish to remain silent and take no actions about injustices they perceive.

ethics
ScottAaronson
philosophy
history
math
via:HackerNews
august 2017 by mcherm

Pi and the collapse of peer review « Math Scholar

august 2017 by mcherm

Pay-to-publish journals can publish the most ridiculous results. Here is a long list of published papers that find a simple algebraic expression for pi.

science
math
ScientificMethod
via:reddit
august 2017 by mcherm

How Checkers Was Solved - The Atlantic

july 2017 by mcherm

The man who only lost 6 times, EVER and how checkers was "solved" (exhaustive search of starting and end games that met in the middle).

history
math
games
via:HackerNews
july 2017 by mcherm

Why is the Quintic Unsolvable?

july 2017 by mcherm

Attempts to show this in an intuitive fashion with one blog post and some interactive graphs not a whole semester of Galois theory. But I didn't read the whole thing.

math
via:HackerNews
datavisualization
july 2017 by mcherm

Mathematical Proof That the Lightning Network Cannot Be a Decentralized Bitcoin Scaling Solution

june 2017 by mcherm

Claims to be a mathematical proof that the core developers proposal for extending Bitcoin won't work. Actually raises a great number of important points but is not a mathematical proof as they claim.

bitcoin
math
via:reddit
june 2017 by mcherm

Clever algorithm to determine whether or not two words are anagrams - math

june 2017 by mcherm

Multiply the primes corresponding to each letter. If primes are assigned in order of letter frequency, the integer might not overflow and it might be efficient.

algorithm
math
via:reddit
computerscience
june 2017 by mcherm

A Puzzle of Clever Connections Nears a Happy End | Quanta Magazine

june 2017 by mcherm

The "happy ending" problem is so named because the two mathematicians who worked on it with Erdos fell in love and married. They lived 70 years more together, then died just a decade before the problem was (almost) solved.

math
history
via:HackerNews
june 2017 by mcherm

The mathematicians who want to save democracy : Nature News & Comment

june 2017 by mcherm

Different mathematicians have different approaches to evaluating how gerrymandered a district map is.

voting
math
via:reddit
june 2017 by mcherm

A new algorithm for finding a visual center of a polygon | Mapbox

may 2017 by mcherm

Use a quadtree to efficiently find a close approximation for the point furthest from the edges of an irregular (and potentially concave) polygon.

algorithm
geometry
math
programming
via:HackerNews
may 2017 by mcherm

Same Stats, Different Graphs: Generating Datasets with Varied Appearance and Identical Statistics through Simulated Annealing | Autodesk Research

may 2017 by mcherm

You can have VERY different visual appearances for the same mean, standard deviation, and other summary statistics. This paper has examples, and explains the technique they used to generate the data sets.

statistics
datavisualization
via:boingboing
math
may 2017 by mcherm

Statistician Proves Gaussian Correlation Inequality | Quanta Magazine

march 2017 by mcherm

A major conjecture in statistics is proved, but nobody notices for a while.

math
via:HackerNews
march 2017 by mcherm

The Fight to Fix Symplectic Geometry | Quanta Magazine

february 2017 by mcherm

Some see math as fundamentally about ideas and some see it as fundamentally about proofs.

math
philosophyOfMath
via:HackerNews
february 2017 by mcherm

Machine Learning Refined book

january 2017 by mcherm

Book from one of the presenters of my machine learning course.

machinelearning
programming
math
january 2017 by mcherm

How do we know that "countably infinite" is the smallest possible size of infinity? - math

january 2017 by mcherm

An interesting discussion of cardinalities and of what can be proved without the axiom of choice.

math
set-theory
axiomofchoice
via:reddit
january 2017 by mcherm

Winning Strategy for Connect-4

january 2017 by mcherm

The game of Connect-4 is solved. This paper explains the winning strategy.

math
games
january 2017 by mcherm

Good math problems to share with kids

january 2017 by mcherm

Has links to several different sources of problems.

math
todo
via:reddit
january 2017 by mcherm

() - 1302.1479v5.pdf

january 2017 by mcherm

Express almost any number from 1 to 11111 using digits 1..9 (or 9..1) in order with operators and/or parentheses inserted between digits. The sole exception is making 10958 using 1..9.

math
via:HackerNews
january 2017 by mcherm

How mathematical language might be different if more mathematicians were wome

january 2017 by mcherm

The analogy to cloth is actually WAY better language than what we actually use.

math
via:reddit
linguistics
january 2017 by mcherm

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