| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > fvsn | Structured version Visualization version GIF version | ||
| Description: The value of a singleton of an ordered pair is the second member. (Contributed by NM, 12-Aug-1994.) (Proof shortened by BJ, 25-Feb-2023.) |
| Ref | Expression |
|---|---|
| fvsn.1 | ⊢ 𝐴 ∈ V |
| fvsn.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| fvsn | ⊢ ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvsn.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | fvsn.2 | . 2 ⊢ 𝐵 ∈ V | |
| 3 | fvsng 7159 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵) | |
| 4 | 1, 2, 3 | mp2an 702 | 1 ⊢ ({〈𝐴, 𝐵〉}‘𝐴) = 𝐵 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1559 ∈ wcel 2141 Vcvv 3453 {csn 4579 〈cop 4585 ‘cfv 6516 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-iota 6472 df-fun 6518 df-fv 6524 |
| This theorem is referenced by: frrlem12 8272 elixpsn 8913 ac6sfi 9222 dcomex 10398 axdc3lem4 10404 0ram 17047 mdet0fv0 22642 chpmat0d 22882 imasdsf1olem 24421 axlowdimlem8 29107 axlowdimlem11 29110 selvply1rhm0 33784 subfacp1lem2a 35491 subfacp1lem5 35495 cvmliftlem4 35599 finixpnum 38065 poimirlem3 38083 fdc 38205 grposnOLD 38342 1arymaptfo 49226 mndtcco 50167 |
| Copyright terms: Public domain | W3C validator |