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Mirrors > Home > MPE Home > Th. List > mbfneg | Structured version Visualization version GIF version |
Description: The negative of a measurable function is measurable. (Contributed by Mario Carneiro, 31-Jul-2014.) |
Ref | Expression |
---|---|
mbfneg.1 | β’ ((π β§ π₯ β π΄) β π΅ β π) |
mbfneg.2 | β’ (π β (π₯ β π΄ β¦ π΅) β MblFn) |
Ref | Expression |
---|---|
mbfneg | β’ (π β (π₯ β π΄ β¦ -π΅) β MblFn) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2737 | . . . . . 6 β’ (π₯ β π΄ β¦ π΅) = (π₯ β π΄ β¦ π΅) | |
2 | mbfneg.1 | . . . . . 6 β’ ((π β§ π₯ β π΄) β π΅ β π) | |
3 | 1, 2 | dmmptd 6651 | . . . . 5 β’ (π β dom (π₯ β π΄ β¦ π΅) = π΄) |
4 | mbfneg.2 | . . . . . 6 β’ (π β (π₯ β π΄ β¦ π΅) β MblFn) | |
5 | 4 | dmexd 7847 | . . . . 5 β’ (π β dom (π₯ β π΄ β¦ π΅) β V) |
6 | 3, 5 | eqeltrrd 2839 | . . . 4 β’ (π β π΄ β V) |
7 | neg1rr 12275 | . . . . 5 β’ -1 β β | |
8 | 7 | a1i 11 | . . . 4 β’ ((π β§ π₯ β π΄) β -1 β β) |
9 | fconstmpt 5699 | . . . . 5 β’ (π΄ Γ {-1}) = (π₯ β π΄ β¦ -1) | |
10 | 9 | a1i 11 | . . . 4 β’ (π β (π΄ Γ {-1}) = (π₯ β π΄ β¦ -1)) |
11 | eqidd 2738 | . . . 4 β’ (π β (π₯ β π΄ β¦ π΅) = (π₯ β π΄ β¦ π΅)) | |
12 | 6, 8, 2, 10, 11 | offval2 7642 | . . 3 β’ (π β ((π΄ Γ {-1}) βf Β· (π₯ β π΄ β¦ π΅)) = (π₯ β π΄ β¦ (-1 Β· π΅))) |
13 | 4, 2 | mbfmptcl 25016 | . . . . 5 β’ ((π β§ π₯ β π΄) β π΅ β β) |
14 | 13 | mulm1d 11614 | . . . 4 β’ ((π β§ π₯ β π΄) β (-1 Β· π΅) = -π΅) |
15 | 14 | mpteq2dva 5210 | . . 3 β’ (π β (π₯ β π΄ β¦ (-1 Β· π΅)) = (π₯ β π΄ β¦ -π΅)) |
16 | 12, 15 | eqtrd 2777 | . 2 β’ (π β ((π΄ Γ {-1}) βf Β· (π₯ β π΄ β¦ π΅)) = (π₯ β π΄ β¦ -π΅)) |
17 | 7 | a1i 11 | . . 3 β’ (π β -1 β β) |
18 | 13 | fmpttd 7068 | . . 3 β’ (π β (π₯ β π΄ β¦ π΅):π΄βΆβ) |
19 | 4, 17, 18 | mbfmulc2re 25028 | . 2 β’ (π β ((π΄ Γ {-1}) βf Β· (π₯ β π΄ β¦ π΅)) β MblFn) |
20 | 16, 19 | eqeltrrd 2839 | 1 β’ (π β (π₯ β π΄ β¦ -π΅) β MblFn) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ wa 397 = wceq 1542 β wcel 2107 Vcvv 3448 {csn 4591 β¦ cmpt 5193 Γ cxp 5636 dom cdm 5638 (class class class)co 7362 βf cof 7620 βcc 11056 βcr 11057 1c1 11059 Β· cmul 11063 -cneg 11393 MblFncmbf 24994 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2708 ax-rep 5247 ax-sep 5261 ax-nul 5268 ax-pow 5325 ax-pr 5389 ax-un 7677 ax-inf2 9584 ax-cnex 11114 ax-resscn 11115 ax-1cn 11116 ax-icn 11117 ax-addcl 11118 ax-addrcl 11119 ax-mulcl 11120 ax-mulrcl 11121 ax-mulcom 11122 ax-addass 11123 ax-mulass 11124 ax-distr 11125 ax-i2m1 11126 ax-1ne0 11127 ax-1rid 11128 ax-rnegex 11129 ax-rrecex 11130 ax-cnre 11131 ax-pre-lttri 11132 ax-pre-lttrn 11133 ax-pre-ltadd 11134 ax-pre-mulgt0 11135 ax-pre-sup 11136 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3066 df-rex 3075 df-rmo 3356 df-reu 3357 df-rab 3411 df-v 3450 df-sbc 3745 df-csb 3861 df-dif 3918 df-un 3920 df-in 3922 df-ss 3932 df-pss 3934 df-nul 4288 df-if 4492 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4871 df-int 4913 df-iun 4961 df-br 5111 df-opab 5173 df-mpt 5194 df-tr 5228 df-id 5536 df-eprel 5542 df-po 5550 df-so 5551 df-fr 5593 df-se 5594 df-we 5595 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6258 df-ord 6325 df-on 6326 df-lim 6327 df-suc 6328 df-iota 6453 df-fun 6503 df-fn 6504 df-f 6505 df-f1 6506 df-fo 6507 df-f1o 6508 df-fv 6509 df-isom 6510 df-riota 7318 df-ov 7365 df-oprab 7366 df-mpo 7367 df-of 7622 df-om 7808 df-1st 7926 df-2nd 7927 df-frecs 8217 df-wrecs 8248 df-recs 8322 df-rdg 8361 df-1o 8417 df-2o 8418 df-er 8655 df-map 8774 df-pm 8775 df-en 8891 df-dom 8892 df-sdom 8893 df-fin 8894 df-sup 9385 df-inf 9386 df-oi 9453 df-dju 9844 df-card 9882 df-pnf 11198 df-mnf 11199 df-xr 11200 df-ltxr 11201 df-le 11202 df-sub 11394 df-neg 11395 df-div 11820 df-nn 12161 df-2 12223 df-3 12224 df-n0 12421 df-z 12507 df-uz 12771 df-q 12881 df-rp 12923 df-xadd 13041 df-ioo 13275 df-ico 13277 df-icc 13278 df-fz 13432 df-fzo 13575 df-fl 13704 df-seq 13914 df-exp 13975 df-hash 14238 df-cj 14991 df-re 14992 df-im 14993 df-sqrt 15127 df-abs 15128 df-clim 15377 df-sum 15578 df-xmet 20805 df-met 20806 df-ovol 24844 df-vol 24845 df-mbf 24999 |
This theorem is referenced by: mbfposb 25033 mbfsub 25042 mbfinf 25045 mbfi1flimlem 25103 itgreval 25177 ibladd 25201 iblabslem 25208 ibladdnc 36164 itgaddnclem2 36166 itgmulc2nclem2 36174 ftc1anclem6 36185 |
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