| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Subclass relationship for class union. Theorem 61 of [Suppes] p. 39. |
| Ref | Expression |
|---|---|
| uniss |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssel 2063 |
. . . . . 6
| |
| 2 | 1 | anim2d 561 |
. . . . 5
|
| 3 | 2 | 19.22dv 1290 |
. . . 4
|
| 4 | 3 | 19.21aiv 1286 |
. . 3
|
| 5 | ss2ab 2116 |
. . 3
| |
| 6 | 4, 5 | sylibr 200 |
. 2
|
| 7 | df-uni 2504 |
. 2
| |
| 8 | df-uni 2504 |
. 2
| |
| 9 | 6, 7, 8 | 3sstr4g 2102 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: unidif 2530 intssuni2 2556 sspwuni 2758 unixpss 3258 relfld 3515 unixp0 3518 trcl 4645 rankuni 4698 cflim 4909 unirnioo 6402 tgval2t 7617 unitgt 7623 tgclt 7624 tgsst 7636 basgen2t 7639 subbas2OLD 7645 distop 7649 fctopOLD 7650 cctop 7652 cncnplem1 7774 uniopn 7861 opnuni 7868 unirnbl 7875 dfchsup2 9298 hsupval2t 9300 hsupvalt 9301 shsupclt 9306 hsupss 9309 shsupunss 9315 shatomistic 10288 fgsb 10570 fgsbOLD 10571 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-in 2051 df-ss 2053 df-uni 2504 |