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Mirrors > Home > MPE Home > Th. List > Mathboxes > refdivpm | Structured version Visualization version GIF version |
Description: The quotient of two functions into the real numbers is a partial function. (Contributed by AV, 16-May-2020.) |
Ref | Expression |
---|---|
refdivpm | ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) ∈ (ℝ ↑pm 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reex 10425 | . . 3 ⊢ ℝ ∈ V | |
2 | 1 | a1i 11 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → ℝ ∈ V) |
3 | simp3 1119 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
4 | refdivmptf 44000 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺):(𝐺 supp 0)⟶ℝ) | |
5 | suppssdm 7645 | . . 3 ⊢ (𝐺 supp 0) ⊆ dom 𝐺 | |
6 | fdm 6350 | . . . . 5 ⊢ (𝐺:𝐴⟶ℝ → dom 𝐺 = 𝐴) | |
7 | 6 | eqcomd 2779 | . . . 4 ⊢ (𝐺:𝐴⟶ℝ → 𝐴 = dom 𝐺) |
8 | 7 | 3ad2ant2 1115 | . . 3 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 = dom 𝐺) |
9 | 5, 8 | syl5sseqr 3905 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐺 supp 0) ⊆ 𝐴) |
10 | elpm2r 8223 | . 2 ⊢ (((ℝ ∈ V ∧ 𝐴 ∈ 𝑉) ∧ ((𝐹 /f 𝐺):(𝐺 supp 0)⟶ℝ ∧ (𝐺 supp 0) ⊆ 𝐴)) → (𝐹 /f 𝐺) ∈ (ℝ ↑pm 𝐴)) | |
11 | 2, 3, 4, 9, 10 | syl22anc 827 | 1 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) ∈ (ℝ ↑pm 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1069 = wceq 1508 ∈ wcel 2051 Vcvv 3410 ⊆ wss 3824 dom cdm 5404 ⟶wf 6182 (class class class)co 6975 supp csupp 7632 ↑pm cpm 8206 ℝcr 10333 0cc0 10334 /f cfdiv 43995 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1759 ax-4 1773 ax-5 1870 ax-6 1929 ax-7 1966 ax-8 2053 ax-9 2060 ax-10 2080 ax-11 2094 ax-12 2107 ax-13 2302 ax-ext 2745 ax-rep 5046 ax-sep 5057 ax-nul 5064 ax-pow 5116 ax-pr 5183 ax-un 7278 ax-cnex 10390 ax-resscn 10391 ax-1cn 10392 ax-icn 10393 ax-addcl 10394 ax-addrcl 10395 ax-mulcl 10396 ax-mulrcl 10397 ax-mulcom 10398 ax-addass 10399 ax-mulass 10400 ax-distr 10401 ax-i2m1 10402 ax-1ne0 10403 ax-1rid 10404 ax-rnegex 10405 ax-rrecex 10406 ax-cnre 10407 ax-pre-lttri 10408 ax-pre-lttrn 10409 ax-pre-ltadd 10410 ax-pre-mulgt0 10411 |
This theorem depends on definitions: df-bi 199 df-an 388 df-or 835 df-3or 1070 df-3an 1071 df-tru 1511 df-ex 1744 df-nf 1748 df-sb 2017 df-mo 2548 df-eu 2585 df-clab 2754 df-cleq 2766 df-clel 2841 df-nfc 2913 df-ne 2963 df-nel 3069 df-ral 3088 df-rex 3089 df-reu 3090 df-rmo 3091 df-rab 3092 df-v 3412 df-sbc 3677 df-csb 3782 df-dif 3827 df-un 3829 df-in 3831 df-ss 3838 df-nul 4174 df-if 4346 df-pw 4419 df-sn 4437 df-pr 4439 df-op 4443 df-uni 4710 df-iun 4791 df-br 4927 df-opab 4989 df-mpt 5006 df-id 5309 df-po 5323 df-so 5324 df-xp 5410 df-rel 5411 df-cnv 5412 df-co 5413 df-dm 5414 df-rn 5415 df-res 5416 df-ima 5417 df-iota 6150 df-fun 6188 df-fn 6189 df-f 6190 df-f1 6191 df-fo 6192 df-f1o 6193 df-fv 6194 df-riota 6936 df-ov 6978 df-oprab 6979 df-mpo 6980 df-of 7226 df-supp 7633 df-er 8088 df-pm 8208 df-en 8306 df-dom 8307 df-sdom 8308 df-pnf 10475 df-mnf 10476 df-xr 10477 df-ltxr 10478 df-le 10479 df-sub 10671 df-neg 10672 df-div 11098 df-fdiv 43996 |
This theorem is referenced by: (None) |
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