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- Difference between ≈, ≃, and ≅ - Mathematics Stack Exchange
In mathematical notation, what are the usage differences between the various approximately-equal signs "≈", "≃", and "≅"? The Unicode standard lists all of them inside the Mathematical Operators B
- notation - What does ∈ mean? - Mathematics Stack Exchange
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 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
- notation - Whats the difference between ≡ and ≣? - Mathematics . . .
What's the difference between "≡" ("identical to") and "≣" ("strictly equivalent to")? "Strictly equivalent to" ("≣") is UTF character 2263, classified in the
- 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
- notation - What does := mean? - Mathematics Stack Exchange
What does := mean?where we are saying that the two sides are equal, but we are not defining "1" to be the expression " sin2(θ) +cos2(θ) sin 2 (θ) + cos 2 (θ) " Basically, some people think that there should be notational difference between saying "I define blah to be equal to blankety " and saying " blah is equal to blankety " So they use := for the first and = for the latter Usually
- What do Subscripted numbers in an equation mean?
@Brian M Scott What does it mean when each subscript is non-numerical, and is exactly the same? I have an equation that has a value T (temperature in Kelvin), subscripted gamma It's used several times each the same way, no variation, and all other equations in the same family simply use T, unsubscripted What might that mean?
- 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
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