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comment Is an empty parenthesis a valid mathematical expression?
The meaning of mathematical notation is highly dependent on context. Which subfield(s) of mathematics are relevant to the case which interests you? And what is your motivation for the question: trying to interpret someone else's use of them, trying to justify using them yourself, trying to win a random bet, ...?
2d
reviewed Close Grammar to Chomsky Normal Form
2d
reviewed Leave Open How can I ask a question in meta about posting some results of an analysis of certain multi-segment integer sequences?
2d
reviewed Close set of numbers, elementary set theory
Apr
23
awarded  Steward
Apr
23
reviewed Close I have to show nullity $B\geq 2$.
Apr
23
reviewed Close Textbook with full solutions: To self-learn logic for the first time
Apr
23
reviewed Close Betti numbers over unital rings
Apr
23
reviewed Close Finding position of point (in 3D space ) which are at x,y offset from corner of a rectangle in 3D world
Apr
23
reviewed Close Finding the limit of $\log(1+ax)/\log(1+x)$
Apr
23
reviewed Close Select 100 integers from 1,2,…,200
Apr
22
reviewed Reviewed Has anyone proven how to trisect an angle with a compass and ruler?
Apr
22
reviewed Close Can't do NFA to DFA
Apr
22
reviewed Close Drawing Bijections for one set
Apr
22
reviewed Close Prove that for any kΕ[0,1] the interval is a confidence interval
Apr
22
reviewed Close What is the densest, most opaque way of saying two odd numbers add up to an even number?
Apr
22
reviewed Close Heuristics for streaming data matching
Apr
22
reviewed Leave Open Calculate the infinite sum $\sum_{1}^\infty \frac{\log{n}}{2n-1}$
Apr
22
reviewed Close Calculate distance between known intersecting points
Apr
22
reviewed Close Differential equation with fixed point