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Mirrors > Home > MPE Home > Th. List > baseval | Structured version Visualization version GIF version |
Description: Value of the base set extractor. (Normally it is preferred to work with (Base‘ndx) rather than the hard-coded 1 in order to make structure theorems portable. This is an example of how to obtain it when needed.) (New usage is discouraged.) (Contributed by NM, 4-Sep-2011.) |
Ref | Expression |
---|---|
baseval.k | ⊢ 𝐾 ∈ V |
Ref | Expression |
---|---|
baseval | ⊢ (Base‘𝐾) = (𝐾‘1) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | baseval.k | . 2 ⊢ 𝐾 ∈ V | |
2 | df-base 17152 | . 2 ⊢ Base = Slot 1 | |
3 | 1, 2 | strfvn 17126 | 1 ⊢ (Base‘𝐾) = (𝐾‘1) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ∈ wcel 2098 Vcvv 3468 ‘cfv 6536 1c1 11110 Basecbs 17151 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-sep 5292 ax-nul 5299 ax-pr 5420 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-ral 3056 df-rex 3065 df-rab 3427 df-v 3470 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-nul 4318 df-if 4524 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-br 5142 df-opab 5204 df-mpt 5225 df-id 5567 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-iota 6488 df-fun 6538 df-fv 6544 df-slot 17122 df-base 17152 |
This theorem is referenced by: (None) |
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