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Mirrors > Home > MPE Home > Th. List > mbf0 | Structured version Visualization version GIF version |
Description: The empty function is measurable. (Contributed by Brendan Leahy, 28-Mar-2018.) |
Ref | Expression |
---|---|
mbf0 | ⊢ ∅ ∈ MblFn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0xp 5663 | . 2 ⊢ (∅ × {1}) = ∅ | |
2 | 0mbl 24465 | . . 3 ⊢ ∅ ∈ dom vol | |
3 | ax-1cn 10814 | . . 3 ⊢ 1 ∈ ℂ | |
4 | mbfconst 24559 | . . 3 ⊢ ((∅ ∈ dom vol ∧ 1 ∈ ℂ) → (∅ × {1}) ∈ MblFn) | |
5 | 2, 3, 4 | mp2an 692 | . 2 ⊢ (∅ × {1}) ∈ MblFn |
6 | 1, 5 | eqeltrri 2837 | 1 ⊢ ∅ ∈ MblFn |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2112 ∅c0 4253 {csn 4557 × cxp 5566 dom cdm 5568 ℂcc 10754 1c1 10757 volcvol 24389 MblFncmbf 24540 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2710 ax-rep 5195 ax-sep 5208 ax-nul 5215 ax-pow 5274 ax-pr 5338 ax-un 7544 ax-inf2 9283 ax-cnex 10812 ax-resscn 10813 ax-1cn 10814 ax-icn 10815 ax-addcl 10816 ax-addrcl 10817 ax-mulcl 10818 ax-mulrcl 10819 ax-mulcom 10820 ax-addass 10821 ax-mulass 10822 ax-distr 10823 ax-i2m1 10824 ax-1ne0 10825 ax-1rid 10826 ax-rnegex 10827 ax-rrecex 10828 ax-cnre 10829 ax-pre-lttri 10830 ax-pre-lttrn 10831 ax-pre-ltadd 10832 ax-pre-mulgt0 10833 ax-pre-sup 10834 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2818 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3711 df-csb 3828 df-dif 3885 df-un 3887 df-in 3889 df-ss 3899 df-pss 3901 df-nul 4254 df-if 4456 df-pw 4531 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4836 df-int 4876 df-iun 4922 df-br 5070 df-opab 5132 df-mpt 5152 df-tr 5178 df-id 5471 df-eprel 5477 df-po 5485 df-so 5486 df-fr 5526 df-se 5527 df-we 5528 df-xp 5574 df-rel 5575 df-cnv 5576 df-co 5577 df-dm 5578 df-rn 5579 df-res 5580 df-ima 5581 df-pred 6178 df-ord 6236 df-on 6237 df-lim 6238 df-suc 6239 df-iota 6358 df-fun 6402 df-fn 6403 df-f 6404 df-f1 6405 df-fo 6406 df-f1o 6407 df-fv 6408 df-isom 6409 df-riota 7191 df-ov 7237 df-oprab 7238 df-mpo 7239 df-of 7490 df-om 7666 df-1st 7782 df-2nd 7783 df-wrecs 8070 df-recs 8131 df-rdg 8169 df-1o 8225 df-2o 8226 df-er 8414 df-map 8533 df-pm 8534 df-en 8650 df-dom 8651 df-sdom 8652 df-fin 8653 df-sup 9085 df-inf 9086 df-oi 9153 df-dju 9544 df-card 9582 df-pnf 10896 df-mnf 10897 df-xr 10898 df-ltxr 10899 df-le 10900 df-sub 11091 df-neg 11092 df-div 11517 df-nn 11858 df-2 11920 df-3 11921 df-n0 12118 df-z 12204 df-uz 12466 df-q 12572 df-rp 12614 df-xadd 12732 df-ioo 12966 df-ico 12968 df-icc 12969 df-fz 13123 df-fzo 13266 df-fl 13394 df-seq 13604 df-exp 13665 df-hash 13927 df-cj 14692 df-re 14693 df-im 14694 df-sqrt 14828 df-abs 14829 df-clim 15079 df-sum 15280 df-xmet 20386 df-met 20387 df-ovol 24390 df-vol 24391 df-mbf 24545 |
This theorem is referenced by: mbfresfi 35592 iblempty 43214 |
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