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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 11179 | . . 3 ⊢ ℝ ∈ V | |
| 2 | 1 | a1i 11 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → ℝ ∈ V) |
| 3 | simp3 1154 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
| 4 | refdivmptf 49173 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺):(𝐺 supp 0)⟶ℝ) | |
| 5 | suppssdm 8161 | . . 3 ⊢ (𝐺 supp 0) ⊆ dom 𝐺 | |
| 6 | fdm 6705 | . . . . 5 ⊢ (𝐺:𝐴⟶ℝ → dom 𝐺 = 𝐴) | |
| 7 | 6 | eqcomd 2771 | . . . 4 ⊢ (𝐺:𝐴⟶ℝ → 𝐴 = dom 𝐺) |
| 8 | 7 | 3ad2ant2 1150 | . . 3 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → 𝐴 = dom 𝐺) |
| 9 | 5, 8 | sseqtrrid 3982 | . 2 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐺 supp 0) ⊆ 𝐴) |
| 10 | elpm2r 8830 | . 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 851 | 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 1101 = wceq 1563 ∈ wcel 2145 Vcvv 3457 ⊆ wss 3907 dom cdm 5652 ⟶wf 6521 (class class class)co 7400 supp csupp 8144 ↑pm cpm 8813 ℝcr 11087 0cc0 11088 /f cfdiv 49168 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5232 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-po 5560 df-so 5561 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-of 7664 df-supp 8145 df-er 8682 df-pm 8815 df-en 8932 df-dom 8933 df-sdom 8934 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-div 11860 df-fdiv 49169 |
| This theorem is referenced by: (None) |
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