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- notation - What does := mean? - Mathematics Stack Exchange
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
- What is the meaning of ⊊? - Mathematics Stack Exchange
I have encountered this when referencing subsets and vector subspaces For example, T ⊊ span(S) should mean that T is smaller than span(S)--at least from what I've gathered Is ⊊ a sort of ≤ or lt
- What is ≡ operator used for in math?
Since your professor was referring to engineering students, then it's likely they were referring to the identity symbol, which is used in an expression to mean the left and right hand sides are true for all values So cos2 θ +sin2 θ ≡ 1 cos 2 θ + sin 2 θ ≡ 1 since it's true for all θ θ whereas cos θ = 1 cos θ = 1 since it's true only for some
- inequality - What does lt; gt; mean? - Mathematics Stack Exchange
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
- The meaning of various equality symbols - Mathematics Stack Exchange
The meaning of various equality symbols Ask Question Asked 10 years, 8 months ago Modified 9 years, 8 months ago
- notation - what does ≼ or ≺ mean? - Mathematics Stack Exchange
The curly versions of the less than and greater than signs are commonly used to denote some other ordering than the one that we are usually talking about For instance there is a partial ordering on the symmetric matrices, where A ≼ B A ≼ B if and only if B − A B A is a nonnegative definite matrix We write ≼ ≼ instead of ≤ ≤ to avoid confusion with the ordering that we use more
- What is the meaning of the double turnstile symbol ($\\models$)?
Just to enlarge on Harry's answer: Your symbol denotes one of two specified notions of implication in formal logic ⊢ ⊢ -the turnstile symbol denotes syntactic implication (syntactic here means related to syntax, the structure of a sentence), where the 'algebra' of the logical system in play (for example sentential calculus) allows us to 'rearrange and cancel' the stuff we know on the left
- Three dot ∴ symbol meaning - Mathematics Stack Exchange
Whats the meaning of this symbol? Its a three dot symbol: ∴ I read a book, im could not find any definition of this symbol This is about continuum property of the natural numbers and the archimed
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