Catalog · All editions
The library of the undeniable.
277 Lenses across mathematics, physics, and related sciences. Each one a short proof you can perceive, not a lesson you have to memorize.
MATH-001
Binary — Counting With Two Symbols
MATH-002
Pack and Unpack — Why Digits Spill Into the Next Column
MATH-003
Combinations vs Permutations — Does Order Matter?
MATH-004
More or Fewer — The Visible Side-by-Side
MATH-005
Whole Numbers in Disguise — Why Decimal Arithmetic Already Works
MATH-006
The Infinite Zoom — What Lives Between Whole Numbers
MATH-007
The Pair Test — Why Some Counts Have a Loner
MATH-008
Geometric Mean — The Square With the Same Area
MATH-009
Golden Ratio — A Cut That Repeats Itself Forever
MATH-010
The Even Cut — Splitting Into Two Equal Halves
MATH-011
The Other Side of the Signpost — Where Direction Becomes Number
MATH-012
The Road That Never Ends — Every Position Is a Number
MATH-013
The Road That Never Ends — Every Position Is a Number
MATH-014
Pascal's Triangle — Numbers That Sum Themselves
MATH-015
Percentage Change — Increases and Decreases Don't Cancel
MATH-016
The Position IS the Size — Why Digits Know Their Worth