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| Mirrors > Home > MPE Home > Th. List > ex-2nd | Structured version Visualization version GIF version | ||
| Description: Example for df-2nd 7969. 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 12268 | . 2 ⊢ 3 ∈ V | |
| 2 | 4re 12270 | . . 3 ⊢ 4 ∈ ℝ | |
| 3 | 2 | elexi 3470 | . 2 ⊢ 4 ∈ V |
| 4 | 1, 3 | op2nd 7977 | 1 ⊢ (2nd ‘〈3, 4〉) = 4 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 〈cop 4595 ‘cfv 6511 2nd c2nd 7967 ℝcr 11067 3c3 12242 4c4 12243 |
| 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 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 ax-un 7711 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-i2m1 11136 ax-1ne0 11137 ax-rrecex 11140 ax-cnre 11141 |
| 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 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-iota 6464 df-fun 6513 df-fv 6519 df-ov 7390 df-2nd 7969 df-2 12249 df-3 12250 df-4 12251 |
| This theorem is referenced by: (None) |
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