## Mathematics (7 pages found in this category)

### Fantasia Mathematica

Anthology of stories, humour, poems, etc. on mathematical topics, published in 1958.

### Mathematical fallacy

Series of steps which is seemingly correct but contains a flawed argument, or a spurious proof of an obvious contradiction such as that 1 = 2. Fallacies differ from simple mistakes in that there is an element of concealment in the presentation of the proof.

### Numerology

Modern successor to arithmomancy, embodying the belief that numbers can explain the workings of the universe and thus allow predictions to be made.

### Perfect number

A perfect number is a positive integer the sum of whose proper divisors is equal to the number itself.

### Prime number

Any positive integer greater than zero that has only two proper divisors, 1 and the number itself. Thus the lowest prime number is 2, which is also the only even prime.

### Proper divisor

Number that when divided into another number leaves no remainder.

### Roman numerals

System of using letters to represent numbers, an idea that was developed by the Phoenicians two thousand years before the founding of the city of Rome.