# Category:Previous POTW

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This category contains proofs that have been **Proof of the Week** some time during the history of ProofWiki.

Note that in this context, the word **week** is to be interpreted loosely.

## Pages in category "Previous POTW"

The following 96 pages are in this category, out of 96 total.

### A

### B

### C

- Cantor's Theorem
- Cantor-Bernstein-Schröder Theorem
- Cardano's Formula
- Cardinality of Set of Surjections
- Cassini's Identity
- Cauchy Condensation Test
- Cauchy Mean Value Theorem
- Chinese Remainder Theorem
- Closed Form for Triangular Numbers
- Combination Theorem for Sequences/Real
- Complex Numbers cannot be Ordered Compatibly with Ring Structure
- Congruence of Sum of Digits to Base Less 1
- Conjugacy Class Equation

### D

### E

### F

### H

### I

### L

- L'Hôpital's Rule
- L'Hôpital's Rule/Weak Version
- Lagrange's Theorem (Group Theory)
- Laplace Transform of Complex Power
- Law of Cosines
- Lebesgue's Number Lemma/Sequentially Compact Space
- Length of Arc of Astroid
- Length of Arc of Nephroid
- Length of Perimeter of Cardioid
- Linear Transformation as Matrix Product