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| Mirrors > Home > MPE Home > Th. List > ex-2nd | Structured version Visualization version GIF version | ||
| Description: Example for df-2nd 7972. 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 12275 | . 2 ⊢ 3 ∈ V | |
| 2 | 4re 12277 | . . 3 ⊢ 4 ∈ ℝ | |
| 3 | 2 | elexi 3473 | . 2 ⊢ 4 ∈ V |
| 4 | 1, 3 | op2nd 7980 | 1 ⊢ (2nd ‘〈3, 4〉) = 4 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 〈cop 4598 ‘cfv 6514 2nd c2nd 7970 ℝcr 11074 3c3 12249 4c4 12250 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pr 5390 ax-un 7714 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-i2m1 11143 ax-1ne0 11144 ax-rrecex 11147 ax-cnre 11148 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-mpt 5192 df-id 5536 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-iota 6467 df-fun 6516 df-fv 6522 df-ov 7393 df-2nd 7972 df-2 12256 df-3 12257 df-4 12258 |
| This theorem is referenced by: (None) |
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