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Mirrors > Home > MPE Home > Th. List > Mathboxes > upgr11wlkdlem1 | Structured version Visualization version GIF version |
Description: Lemma 1 for upgr11wlkd 41314. (Contributed by AV, 22-Jan-2021.) |
Ref | Expression |
---|---|
upgr11wlkd.p | ⊢ 𝑃 = 〈“𝑋𝑌”〉 |
upgr11wlkd.f | ⊢ 𝐹 = 〈“𝐽”〉 |
upgr11wlkd.x | ⊢ (𝜑 → 𝑋 ∈ (Vtx‘𝐺)) |
upgr11wlkd.y | ⊢ (𝜑 → 𝑌 ∈ (Vtx‘𝐺)) |
upgr11wlkd.j | ⊢ (𝜑 → ((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌}) |
Ref | Expression |
---|---|
upgr11wlkdlem1 | ⊢ ((𝜑 ∧ 𝑋 = 𝑌) → ((iEdg‘𝐺)‘𝐽) = {𝑋}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | upgr11wlkd.j | . . 3 ⊢ (𝜑 → ((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌}) | |
2 | preq2 4213 | . . . . . . 7 ⊢ (𝑌 = 𝑋 → {𝑋, 𝑌} = {𝑋, 𝑋}) | |
3 | 2 | eqeq2d 2620 | . . . . . 6 ⊢ (𝑌 = 𝑋 → (((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌} ↔ ((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋})) |
4 | 3 | eqcoms 2618 | . . . . 5 ⊢ (𝑋 = 𝑌 → (((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌} ↔ ((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋})) |
5 | simpl 472 | . . . . . . 7 ⊢ ((((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋} ∧ 𝜑) → ((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋}) | |
6 | dfsn2 4138 | . . . . . . 7 ⊢ {𝑋} = {𝑋, 𝑋} | |
7 | 5, 6 | syl6eqr 2662 | . . . . . 6 ⊢ ((((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋} ∧ 𝜑) → ((iEdg‘𝐺)‘𝐽) = {𝑋}) |
8 | 7 | ex 449 | . . . . 5 ⊢ (((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑋} → (𝜑 → ((iEdg‘𝐺)‘𝐽) = {𝑋})) |
9 | 4, 8 | syl6bi 242 | . . . 4 ⊢ (𝑋 = 𝑌 → (((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌} → (𝜑 → ((iEdg‘𝐺)‘𝐽) = {𝑋}))) |
10 | 9 | com13 86 | . . 3 ⊢ (𝜑 → (((iEdg‘𝐺)‘𝐽) = {𝑋, 𝑌} → (𝑋 = 𝑌 → ((iEdg‘𝐺)‘𝐽) = {𝑋}))) |
11 | 1, 10 | mpd 15 | . 2 ⊢ (𝜑 → (𝑋 = 𝑌 → ((iEdg‘𝐺)‘𝐽) = {𝑋})) |
12 | 11 | imp 444 | 1 ⊢ ((𝜑 ∧ 𝑋 = 𝑌) → ((iEdg‘𝐺)‘𝐽) = {𝑋}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 = wceq 1475 ∈ wcel 1977 {csn 4125 {cpr 4127 ‘cfv 5804 〈“cs1 13149 〈“cs2 13437 Vtxcvtx 25673 iEdgciedg 25674 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-un 3545 df-sn 4126 df-pr 4128 |
This theorem is referenced by: upgr11wlkd 41314 upgr1trld 41315 upgr1pthd 41316 upgr1pthond 41317 |
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