<P> Includes upside - down letters . </P> <P> Also called diacritics . </P> <Table> <Tr> <Th> Symbol in HTML </Th> <Th> Symbol in TeX </Th> <Th> Name </Th> <Th> Explanation </Th> <Th> Examples </Th> </Tr> <Tr> <Th> Read as </Th> </Tr> <Tr> <Th> Category </Th> </Tr> <Tr> <Td> </Td> <Td> a _̄ (\ displaystyle (\ bar (a))) \ bar (a) </Td> <Td> mean overbar;...bar statistics </Td> <Td> x _̄ (\ displaystyle (\ bar (x))) (often read as "x bar") is the mean (average value of x i (\ displaystyle x_ (i))). </Td> <Td> x = (1, 2, 3, 4, 5); x _̄ = 3 (\ displaystyle x = \ (1, 2, 3, 4, 5 \); (\ bar (x)) = 3). </Td> </Tr> <Tr> <Td> finite sequence, tuple finite sequence, tuple model theory </Td> <Td> a _̄ (\ displaystyle (\ overline (a))) means the finite sequence / tuple (a 1, a 2,..., a n). (\ displaystyle (a_ (1), a_ (2),..., a_ (n)).). </Td> <Td> a _̄: = (a 1, a 2,..., a n) (\ displaystyle (\ overline (a)): = (a_ (1), a_ (2),..., a_ (n))). </Td> </Tr> <Tr> <Td> algebraic closure algebraic closure of field theory </Td> <Td> F _̄ (\ displaystyle (\ overline (F))) is the algebraic closure of the field F . </Td> <Td> The field of algebraic numbers is sometimes denoted as Q _̄ (\ displaystyle (\ overline (\ mathbb (Q)))) because it is the algebraic closure of the rational numbers Q (\ displaystyle (\ mathbb (Q))). </Td> </Tr> <Tr> <Td> complex conjugate conjugate complex numbers </Td> <Td> z _̄ (\ displaystyle (\ overline (z))) means the complex conjugate of z . (z can also be used for the conjugate of z, as described above .) </Td> <Td> 3 + 4 i _̄ = 3 − 4 i (\ displaystyle (\ overline (3 + 4i)) = 3 - 4i). </Td> </Tr> <Tr> <Td> topological closure (topological) closure of topology </Td> <Td> S _̄ (\ displaystyle (\ overline (S))) is the topological closure of the set S . This may also be denoted as cl (S) or Cl (S). </Td> <Td> In the space of the real numbers, Q _̄ = R (\ displaystyle (\ overline (\ mathbb (Q))) = \ mathbb (R)) (the rational numbers are dense in the real numbers). </Td> </Tr> <Tr> <Td> a ⇀ (\ displaystyle (\ overset (\ rightharpoonup) (a))) </Td> <Td> a ⇀ (\ displaystyle (\ overset (\ rightharpoonup) (a))) \ overset (\ rightharpoonup) (a) </Td> <Td> vector harpoon linear algebra </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> â </Td> <Td> a ^ (\ displaystyle (\ hat (a))) \ hat a </Td> <Td> unit vector hat geometry </Td> <Td> a ^ (\ displaystyle \ mathbf (\ hat (a))) (pronounced "a hat") is the normalized version of vector a (\ displaystyle \ mathbf (a)), having length 1 . </Td> <Td> </Td> </Tr> <Tr> <Td> estimator estimator for statistics </Td> <Td> θ ^ (\ displaystyle (\ hat (\ theta))) is the estimator or the estimate for the parameter θ (\ displaystyle \ theta). </Td> <Td> The estimator μ ^ = ∑ i x i n (\ displaystyle \ mathbf (\ hat (\ mu)) = (\ frac (\ sum _ (i) x_ (i)) (n))) produces a sample estimate μ ^ (x) (\ displaystyle \ mathbf (\ hat (\ mu)) (\ mathbf (x))) for the mean μ (\ displaystyle \ mu). </Td> </Tr> <Tr> <Td> ′ </Td> <Td> ′ (\ displaystyle')' </Td> <Td> derivative...prime; derivative of calculus </Td> <Td> f ′ (x) means the derivative of the function f at the point x, i.e., the slope of the tangent to f at x . (The single - quote character' is sometimes used instead, especially in ASCII text .) </Td> <Td> If f (x): = x, then f ′ (x) = 2x . </Td> </Tr> <Tr> <Td> </Td> <Td> _̇ (\ displaystyle (\ dot (\,))) \ dot (\,) </Td> <Td> derivative...dot; time derivative of calculus </Td> <Td> x _̇ (\ displaystyle (\ dot (x))) means the derivative of x with respect to time . That is x _̇ (t) = ∂ ∂ t x (t) (\ displaystyle (\ dot (x)) (t) = (\ frac (\ partial) (\ partial t)) x (t)). </Td> <Td> If x (t): = t, then x _̇ (t) = 2 t (\ displaystyle (\ dot (x)) (t) = 2t). </Td> </Tr> </Table> <Tr> <Th> Symbol in HTML </Th> <Th> Symbol in TeX </Th> <Th> Name </Th> <Th> Explanation </Th> <Th> Examples </Th> </Tr>

What is the symbol to represent the mean
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