Archives: Directories

Discover the ultimate compilation of practical tools, beautiful books, fancy gadgets, must watch movies, and ingenious ideas are thoughtfully organized into lists that provoke curiosity and celebrate the beauty of science, mathematics, and the internet, —each list carefully assembled by Ali.

John Nash's Recommendation Letter for Princeton University | Abakcus
Princeton U. digitized John Nash’s academic files and released them to the public. His recommendation
PE teacher Dale Irby
Have you ever been so embarrassed by a mistake that you turned it into a
Newton's College Notebook
Newton’s College Notebook was filled with Newton’s personal annotations, mathematical formulas, and discoveries that paved
Today, I stumbled upon The Calculus of Friendship’s Japanese edition and loved the cover images.
John Whitney’s book Digital Harmony – On the Complementarity of Music and Visual Art is
Paul Dirac's PhD thesis
Paul Dirac’s PhD thesis is an unparalleled masterpiece in the field of science. At the
In one episode of Simpsons, Lisa Simpson creates a perpetual motion machine that defies the
Cantor's Breakfast | Cool Math Stuff | Abakcus
Georg Cantor’s findings have played an important role in shaping modern-day mathematics in advancing further
Isaac Asimov's Letter to Celebrate the Opening of a Library
Isaac Asimov is renowned for being one of the most influential science fiction authors, but
Sylvia Rexach
Sylvia Rexach was an extraordinary woman and artist who deserves great recognition. The Puerto Rican
Katharine Briggs | Overlook Women | Abakcus
Katharine Briggs was a remarkable yet often overlooked woman who deserves recognition for her contributions
Maria Orosa | Overlook Women | Abakcus
Maria Orosa was an exceptional and overlooked woman who made significant contributions to the Philippines
Audrey Munson | Overlooked Women | Abakcus
Audrey Munson was a remarkable yet often overlooked woman in the early 20th century. She
Vera Menchik
Vera Mencikova was an overlooked woman in history who deserves much more recognition. Although she
The Minimal Surface Equation
The minimal surface equation may be an abstract mathematical concept, but its applications in the
Callan-Symanzik Equation
Callan-Symanzik Equation provides a mathematically rigorous expression which is essential for understanding why naive expectations
Euler–Lagrange equations
Euler–Lagrange equations have long been considered a pillar of mathematical foundations in the calculus of
1 = 0.999999999….
The idea that one can be expressed as 0.999… followed by an infinite string of
Special relativity
Albert Einstein’s special relativity equation has been a longstanding source of fascination and inspiration for
Euler's Characteristic | Abakcus
Euler characteristic is one of mathematics’ most efficient and elegant equations and holds great importance
The fundamental theorem of calculus
The fundamental theorem of calculus is one of the most beautiful equations in mathematics. It
Einstein's General Relativity Equation | Abakcus
Albert Einstein’s most fundamental contribution to science was the development of his general relativity equation.
Henry Billingsley's Elements of Euclid With Pop-Up Models
Henry Billingsley was an English merchant who later became the mayor of London. He is
13-year-old prodigy Elliott Tanner | Abakcus
This is Elliot Tanner. Even though he is just thirteen years old, he has just
Have you ever seen what a periodic table literally looks like in real life? That is some grade-a-nerd humor right there!
Have you ever seen what a periodic table literally looks like in real life? That
The proof of 0.9999... = 1
Interestingly, the real number 0.999 is actually equal to the integer 1. It may not
These gorgeous geometric patterns were included in a collection of large-scale, vividly colored works by
1/499999
Here is an interesting division 1/499999! If you divide 1 by 499999, you get all
A Real Introduction to Calculus
This guy wanted to teach his niece calculus and get the book “Introductory Calculus for
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