A few days ago, I wrote about how I thought the equals sign could be used incorrectly and commented on how the ‘equivalent to’ sign should be used in it’s place. After further reading into the matter, I have discovered that the ‘Triple Bar‘ or ‘Identity‘ symbol is one of many forms of the equals sign. The official definition of this, from wikipedia, is:

The triple bar symbol “≡” (U+2261) is often used to indicate an identity, a definition (which can also be represented by “≝”, U+225D), or a congruence relation in modular arithmetic. The symbol “≘” can be used to express that an item corresponds to another.

Therefore, I can confirm that using the equals sign when describing equality. There are many variations of the sign all with their own little alteration of meaning.