# What does the triangle equals sign mean?

1. Jan 4, 2010

2. Jan 4, 2010

### LCKurtz

It is sometimes used to mean "is defined as" or equals by definition.

3. Jan 4, 2010

### HallsofIvy

Agree with LCKurtz.

4. Jan 4, 2010

### pellman

Gracias, amigos.

does it differ in meaning from the triple-equals sign? $$\equiv$$

5. Jan 5, 2010

### elibj123

The triple-equals is usually used to denote that a function identically equals some constant number (or another function).