- An Elementary Proof for Two Basic Alternating Series
- Irrationality of The Square Root of Two -- A Geometric Proof
- Counterexamples to a Comparison Test for Alternating Series
- The Alternating Harmonic Series
- Proof Without Words: Alternating Sum of an Even Number of Triangular Numbers
- A New Proof of the Double Butterfly Theorem
- Comparing a b and b a Using Elementary Calculus
- Early Two-Dimensional Reconstruction and Recent Topics Stemming From It
- A Triangular Inequality and Its Elementary Proof
- Elementary Proof that e is Irrational
- Elementary Proof that e is Not Quadratically Algebraic
- An Application of a Famous Inequality
- An Elementary Approach to y'' = -y
- Another Elementary Proof of Heron's Formula
- A Geometric Proof of the Formula for ln 2
- Proof of a Mixed Arithmetic-Mean, Geometric-Mean Inequality
- Proof Without Words: Alternating Sums of Squares of Odd Numbers
- Closed-Form Formulas for Quasi-Geometric Series
- A Radon-Nikodym Theorem for Completely Multi-Positive Linear Maps and Its Applications
- Axiomatic Convexity Theory and Relationships Between The Carathéodory, Helly, and Radon Numbers
- The Geometry of Radon's Theorem
- A Stronger Triangle Inequality
- Tetrahedral Numbers as Sums of Squares Numbers
- Computerized Tomography: The New Medical X-Ray Technology
- Triangulation of a Triangle
- Beyond Monge's Theorem: A Generalization of the Pythagorean Theorem
- A Generalization of the Pythagorean Theorem
Combinatorial proofs:
