Yahoo: What Is the Meaning of a White Butterfly? The Facts About the Auspicious Symbol
What Is the Meaning of a White Butterfly? The Facts About the Auspicious Symbol
9NEWS: A stroke of symbolism: The meaning of the monarch butterfly in migration
A stroke of symbolism: The meaning of the monarch butterfly in migration
These gentle insects pack a whole lot of spiritual meaning. With over 1,000 species known, the white butterfly is native to Europe and Asia. But unlike other butterflies, which are sometimes seen as a ...
Other symbols I have seen used for "is defined to be equal to" are three horizontal lines instead of two, and $=$ with either a triangle or "def" written directly above it. I have seen variants of these used by people who predate widespread knowledge of computer programming. It would be interesting to know the earliest uses of a special symbol for this (and what symbols were chosen). An ...
I have started seeing the "∈" symbol in math. What exactly does it mean? I have tried googling it but google takes the symbol out of the search.
What do the less-than and greater-than symbols right next to each other mean? Does it mean either less than or greater than? In other words, not equal? I am trying to understand a book that says th...
In summary: The interplay of meaning and axiomatic machine mathematics, captured by the difference between $\models$ and $\vdash$, is a subtle and interesting thing.
Maybe instead of handling your example, because the context is not always relevant, let's look at possible groupings of the symbols. Equality $=$ is usually used for equality. $\equiv$ is occasionally used for "identically equal to," which is in a sense stronger than equality, by denoting that the thing on the left and the thing on the right are equal in a sense that they are identities of ...