Volume 53
, Issue 2


Dear Readers, the articles in this special issue of Parabola were written by high school students and introduces the comic $2\mathbb{Z}$ Or Not $2\mathbb{Z}$. I dedicate this issue to my colleague Susannah Waters.

We present a epsilon-delta definition of limits for real functions and we show how to derive proofs that use this useful definition. A brief section on continuity with the epsilon-delta definition is also included.

The Dalivian coordinate system presents a new way to graph points in a coordinate plane, using the non-origin intersection of two parabolas, $x = ay^2$ and $y = bx^2$.

When a number $k$ has the property that all prime numbers greater than $k$ are of the form $kn\pm 1$ where $n$ is an integer greater than 0, we say that $k$ is a prime determinant. In this paper, I will prove that 1, 2, 3, 4, 6 are prime determinants, and give reasons why no other numbers are.

In this paper, we are going to explore how many dimensions it takes to embed a wheel graph with multiple hubs in Euclidean space.

An odd comic about even numbers

Q1531 Take any four consecutive whole numbers, multiply them together and add 1. Make a conjecture and prove it!

Q1521 Solve the equation $\sqrt{x + 20} + \sqrt{x} = 17$.