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 4194 | . . . . . . 7 ⊢ (𝑥 ∈ {𝐴} → 𝑥 = 𝐴) | |
2 | 1 | fveq2d 6195 | . . . . . 6 ⊢ (𝑥 ∈ {𝐴} → (𝐹‘𝑥) = (𝐹‘𝐴)) |
3 | 2 | mpteq2ia 4740 | . . . . 5 ⊢ (𝑥 ∈ {𝐴} ↦ (𝐹‘𝑥)) = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴)) |
4 | 3 | a1i 11 | . . . 4 ⊢ (𝜑 → (𝑥 ∈ {𝐴} ↦ (𝐹‘𝑥)) = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴))) |
5 | rnsnf.2 | . . . . 5 ⊢ (𝜑 → 𝐹:{𝐴}⟶𝐵) | |
6 | 5 | feqmptd 6249 | . . . 4 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝑥))) |
7 | rnsnf.1 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
8 | fvexd 6203 | . . . . 5 ⊢ (𝜑 → (𝐹‘𝐴) ∈ V) | |
9 | fmptsn 6433 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ (𝐹‘𝐴) ∈ V) → {〈𝐴, (𝐹‘𝐴)〉} = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴))) | |
10 | 7, 8, 9 | syl2anc 693 | . . . 4 ⊢ (𝜑 → {〈𝐴, (𝐹‘𝐴)〉} = (𝑥 ∈ {𝐴} ↦ (𝐹‘𝐴))) |
11 | 4, 6, 10 | 3eqtr4d 2666 | . . 3 ⊢ (𝜑 → 𝐹 = {〈𝐴, (𝐹‘𝐴)〉}) |
12 | 11 | rneqd 5353 | . 2 ⊢ (𝜑 → ran 𝐹 = ran {〈𝐴, (𝐹‘𝐴)〉}) |
13 | rnsnopg 5614 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ran {〈𝐴, (𝐹‘𝐴)〉} = {(𝐹‘𝐴)}) | |
14 | 7, 13 | syl 17 | . 2 ⊢ (𝜑 → ran {〈𝐴, (𝐹‘𝐴)〉} = {(𝐹‘𝐴)}) |
15 | 12, 14 | eqtrd 2656 | 1 ⊢ (𝜑 → ran 𝐹 = {(𝐹‘𝐴)}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1483 ∈ wcel 1990 Vcvv 3200 {csn 4177 〈cop 4183 ↦ cmpt 4729 ran crn 5115 ⟶wf 5884 ‘cfv 5888 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 |
This theorem is referenced by: fsneqrn 39403 unirnmapsn 39406 sge0sn 40596 |
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