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Journal of Applied Mathematics
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2013
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Article
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Figbox 3
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Research Article
Formalization of Linear Space Theory in the Higher-Order Logic Proving System
Box 3
val ls = “ls: ′a linear_space”;
val ls_add = “!x:′a y:′a. x IN ls
∧
y IN ls ==> ?!z:′a. (z = x LP y)
∧
z IN ls ”;