<Tr> <Td> c </Td> <Td> c (\ displaystyle (\ mathfrak (c))) \ mathfrak c </Td> <Td> cardinality of the continuum cardinality of the continuum; c; cardinality of the real numbers set theory </Td> <Td> The cardinality of R (\ displaystyle \ mathbb (R)) is denoted by R (\ displaystyle \ mathbb (R)) or by the symbol c (\ displaystyle (\ mathfrak (c))) (a lowercase Fraktur letter C). </Td> <Td> c = ב 1 (\ displaystyle (\ mathfrak (c)) = (\ beth) _ (1)) <P> </P> </Td> </Tr> <Tr> <Td> ∂ </Td> <Td> ∂ (\ displaystyle \ partial) \ partial </Td> <Td> partial derivative partial; d calculus </Td> <Td> ∂ f / ∂ x means the partial derivative of f with respect to x, where f is a function on (x,..., x). </Td> <Td> If f (x, y): = x y, then ∂ f / ∂ x = 2xy, </Td> </Tr> <Tr> <Td> boundary boundary of topology </Td> <Td> ∂ M means the boundary of M </Td> <Td> ∂ (x: x ≤ 2) = (x: x = 2) </Td> </Tr> <Tr> <Td> degree of a polynomial degree of algebra </Td> <Td> ∂ f means the degree of the polynomial f . (This may also be written deg f .) </Td> <Td> ∂ (x − 1) = 2 </Td> </Tr>

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