Definition df-10OLD 10964

Description: Define the number 10. See remarks under df-2 10956. (Contributed by NM, 5-Feb-2007.) Obsolete as of 9-Sep-2021. (New usage is discouraged.)

Assertion

Ref	Expression
df-10OLD	⊢ 10 = (9 + 1)

Detailed syntax breakdown of Definition df-10OLD

Step	Hyp	Ref	Expression
1		c10 10955	. 2 class 10
2		c9 10954	. . 3 class 9
3		c1 9816	. . 3 class 1
4		caddc 9818	. . 3 class +
5	2, 3, 4	co 6549	. 2 class (9 + 1)
6	1, 5	wceq 1475	1 wff 10 = (9 + 1)

This definition is referenced by:  10reOLD  10986  10posOLD  11000  9p1e10OLD  11036  5p5e10OLD  11045  6p4e10OLD  11048  7p3e10OLD  11050  8p2e10OLD  11051  10nnOLD  11070  9lt10OLD  11107  decsuccOLD  11427  9p2e11OLD  11496  0.999...OLD  14452  3dvdsOLD  14891  3dvdsdecOLD  14893  3dvds2decOLD  14895