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ExactCouples :: isEvenDegree

isEvenDegree -- for a couple ring Q, Q.isEvenDegree returns true on page-degrees of Q

Caveat

this value must be installed by hand or by expectCoupleRing(Q)

See also

expectCoupleRing -- accepts certain rings of the form R[e_r,f_r], and installs Page, isEvenDegree, and isOddDegree

For the programmer

The object isEvenDegree is a symbol.