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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > rnsnf | Structured version Visualization version GIF version |
Description: The range of a function whose domain is a singleton. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
rnsnf.1 | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
rnsnf.2 | ⊢ (𝜑 → 𝐹:{𝐴}⟶𝐵) |
Ref | Expression |
---|---|
rnsnf | ⊢ (𝜑 → ran 𝐹 = {(𝐹‘𝐴)}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elsni 4648 | . . . . . 6 ⊢ (𝑥 ∈ {𝐴} → 𝑥 = 𝐴) | |
2 | 1 | fveq2d 6911 | . . . . 5 ⊢ (𝑥 ∈ {𝐴} → (𝐹‘𝑥) = (𝐹‘𝐴)) |
3 | 2 | mpteq2ia 5251 | . . . 4 ⊢ (𝑥 ∈ {𝐴} ↦ (𝐹‘𝑥)) = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴)) |
4 | rnsnf.2 | . . . . 5 ⊢ (𝜑 → 𝐹:{𝐴}⟶𝐵) | |
5 | 4 | feqmptd 6977 | . . . 4 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝑥))) |
6 | rnsnf.1 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
7 | fvexd 6922 | . . . . 5 ⊢ (𝜑 → (𝐹‘𝐴) ∈ V) | |
8 | fmptsn 7187 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ (𝐹‘𝐴) ∈ V) → {〈𝐴, (𝐹‘𝐴)〉} = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴))) | |
9 | 6, 7, 8 | syl2anc 584 | . . . 4 ⊢ (𝜑 → {〈𝐴, (𝐹‘𝐴)〉} = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴))) |
10 | 3, 5, 9 | 3eqtr4a 2801 | . . 3 ⊢ (𝜑 → 𝐹 = {〈𝐴, (𝐹‘𝐴)〉}) |
11 | 10 | rneqd 5952 | . 2 ⊢ (𝜑 → ran 𝐹 = ran {〈𝐴, (𝐹‘𝐴)〉}) |
12 | rnsnopg 6243 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ran {〈𝐴, (𝐹‘𝐴)〉} = {(𝐹‘𝐴)}) | |
13 | 6, 12 | syl 17 | . 2 ⊢ (𝜑 → ran {〈𝐴, (𝐹‘𝐴)〉} = {(𝐹‘𝐴)}) |
14 | 11, 13 | eqtrd 2775 | 1 ⊢ (𝜑 → ran 𝐹 = {(𝐹‘𝐴)}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2106 Vcvv 3478 {csn 4631 〈cop 4637 ↦ cmpt 5231 ran crn 5690 ⟶wf 6559 ‘cfv 6563 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pr 5438 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-reu 3379 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-ss 3980 df-nul 4340 df-if 4532 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 |
This theorem is referenced by: fsneqrn 45154 unirnmapsn 45157 sge0sn 46335 |
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