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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 10630 | . . 3 ⊢ ℝ ∈ V | |
2 | 1 | a1i 11 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → ℝ ∈ V) |
3 | simp3 1134 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
4 | refdivmptf 44609 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺):(𝐺 supp 0)⟶ℝ) | |
5 | suppssdm 7845 | . . 3 ⊢ (𝐺 supp 0) ⊆ dom 𝐺 | |
6 | fdm 6524 | . . . . 5 ⊢ (𝐺:𝐴⟶ℝ → dom 𝐺 = 𝐴) | |
7 | 6 | eqcomd 2829 | . . . 4 ⊢ (𝐺:𝐴⟶ℝ → 𝐴 = dom 𝐺) |
8 | 7 | 3ad2ant2 1130 | . . 3 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 = dom 𝐺) |
9 | 5, 8 | sseqtrrid 4022 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐺 supp 0) ⊆ 𝐴) |
10 | elpm2r 8426 | . 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 836 | 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 1083 = wceq 1537 ∈ wcel 2114 Vcvv 3496 ⊆ wss 3938 dom cdm 5557 ⟶wf 6353 (class class class)co 7158 supp csupp 7832 ↑pm cpm 8409 ℝcr 10538 0cc0 10539 /f cfdiv 44604 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-po 5476 df-so 5477 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-of 7411 df-supp 7833 df-er 8291 df-pm 8411 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-fdiv 44605 |
This theorem is referenced by: (None) |
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