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Definition df-cda 8569
Description: Define cardinal number addition. Definition of cardinal sum in [Mendelson] p. 258. See cdaval 8571 for its value and a description. (Contributed by NM, 24-Sep-2004.)
Assertion
Ref Expression
df-cda
Distinct variable group:   ,

Detailed syntax breakdown of Definition df-cda
StepHypRef Expression
1 ccda 8568 . 2
2 vx . . 3
3 vy . . 3
4 cvv 3109 . . 3
52cv 1394 . . . . 5
6 c0 3784 . . . . . 6
76csn 4029 . . . . 5
85, 7cxp 5002 . . . 4
93cv 1394 . . . . 5
10 c1o 7142 . . . . . 6
1110csn 4029 . . . . 5
129, 11cxp 5002 . . . 4
138, 12cun 3473 . . 3
142, 3, 4, 4, 13cmpt2 6298 . 2
151, 14wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  cdafn  8570  cdaval  8571
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