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单词 gauge function
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gauge function
gauge function n. Mathematics (see quot. 1965).
ΚΠ
1937 J. von Neumann Coll. Wks. (1962) IV. 208 A familiar symmetric gauge function is ϕp(u1,..un = ∑ni=1 |ui|p1/p for 1 ≤ p < + ∞.
1965 Pacific Jrnl. Math. 15 242 A function ϕ on a complex vector space is called a gauge function if ϕ(u) > 0 when u ≠ 0, ϕ(αu) = |α|ϕ(u) for complex α, ϕ(u + v) ≤ ϕ(u) + ϕ(v).
extracted from gaugen.
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