Theorem deg1xrf

Description: Functionality of univariate polynomial degree, weak range. (Contributed by Stefan O'Rear, 23-Mar-2015)

	Ref	Expression
Hypotheses	deg1xrf.d	|- D = ( deg1 ` R )
	deg1xrf.p	|- P = ( Poly1 ` R )
	deg1xrf.b	|- B = ( Base ` P )
Assertion	deg1xrf	|- D : B --> RR*

Proof

Step	Hyp	Ref	Expression
1		deg1xrf.d	|- D = ( deg1 ` R )
2		deg1xrf.p	|- P = ( Poly1 ` R )
3		deg1xrf.b	|- B = ( Base ` P )
4	1	deg1fval	|- D = ( 1o mDeg R )
5		eqid	|- ( 1o mPoly R ) = ( 1o mPoly R )
6	2 3	ply1bas	|- B = ( Base ` ( 1o mPoly R ) )
7	4 5 6	mdegxrf	|- D : B --> RR*