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| Mirrors > Home > MPE Home > Th. List > ex-fv | Structured version Visualization version GIF version | ||
| Description: Example for df-fv 6574. Example by David A. Wheeler. (Contributed by Mario Carneiro, 7-May-2015.) |
| Ref | Expression |
|---|---|
| ex-fv | ⊢ (𝐹 = {〈2, 6〉, 〈3, 9〉} → (𝐹‘3) = 9) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq1 6915 | . 2 ⊢ (𝐹 = {〈2, 6〉, 〈3, 9〉} → (𝐹‘3) = ({〈2, 6〉, 〈3, 9〉}‘3)) | |
| 2 | 2re 12457 | . . . 4 ⊢ 2 ∈ ℝ | |
| 3 | 2lt3 12556 | . . . 4 ⊢ 2 < 3 | |
| 4 | 2, 3 | ltneii 11462 | . . 3 ⊢ 2 ≠ 3 |
| 5 | 3ex 12465 | . . . 4 ⊢ 3 ∈ V | |
| 6 | 9re 12482 | . . . . 5 ⊢ 9 ∈ ℝ | |
| 7 | 6 | elexi 3476 | . . . 4 ⊢ 9 ∈ V |
| 8 | 5, 7 | fvpr2 7229 | . . 3 ⊢ (2 ≠ 3 → ({〈2, 6〉, 〈3, 9〉}‘3) = 9) |
| 9 | 4, 8 | ax-mp 5 | . 2 ⊢ ({〈2, 6〉, 〈3, 9〉}‘3) = 9 |
| 10 | 1, 9 | eqtrdi 2814 | 1 ⊢ (𝐹 = {〈2, 6〉, 〈3, 9〉} → (𝐹‘3) = 9) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ≠ wne 2959 {cpr 4590 〈cop 4840 ‘cfv 6566 ℝcr 11238 2c2 12437 3c3 12438 6c6 12441 9c9 12444 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-po 5566 df-so 5567 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-2 12445 df-3 12446 df-4 12447 df-5 12448 df-6 12449 df-7 12450 df-8 12451 df-9 12452 |
| This theorem is used by: (None) |
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