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| Mirrors > Home > MPE Home > Th. List > ex-2nd | Structured version Visualization version GIF version | ||
| Description: Example for df-2nd 7936. Example by David A. Wheeler. (Contributed by Mario Carneiro, 18-Jun-2015.) |
| Ref | Expression |
|---|---|
| ex-2nd | ⊢ (2nd ‘〈3, 4〉) = 4 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3ex 12254 | . 2 ⊢ 3 ∈ V | |
| 2 | 4re 12256 | . . 3 ⊢ 4 ∈ ℝ | |
| 3 | 2 | elexi 3453 | . 2 ⊢ 4 ∈ V |
| 4 | 1, 3 | op2nd 7944 | 1 ⊢ (2nd ‘〈3, 4〉) = 4 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 〈cop 4574 ‘cfv 6492 2nd c2nd 7934 ℝcr 11028 3c3 12228 4c4 12229 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5370 ax-un 7682 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-i2m1 11097 ax-1ne0 11098 ax-rrecex 11101 ax-cnre 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-iota 6448 df-fun 6494 df-fv 6500 df-ov 7363 df-2nd 7936 df-2 12235 df-3 12236 df-4 12237 |
| This theorem is referenced by: (None) |
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