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| Mirrors > Home > MPE Home > Th. List > Mathboxes > diag2f1lem | Structured version Visualization version GIF version | ||
| Description: Lemma for diag2f1 49027. The converse is trivial (fveq2 6905). (Contributed by Zhi Wang, 21-Oct-2025.) |
| Ref | Expression |
|---|---|
| diag2f1.l | ⊢ 𝐿 = (𝐶Δfunc𝐷) |
| diag2f1.a | ⊢ 𝐴 = (Base‘𝐶) |
| diag2f1.b | ⊢ 𝐵 = (Base‘𝐷) |
| diag2f1.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| diag2f1.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| diag2f1.d | ⊢ (𝜑 → 𝐷 ∈ Cat) |
| diag2f1.x | ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
| diag2f1.y | ⊢ (𝜑 → 𝑌 ∈ 𝐴) |
| diag2f1.0 | ⊢ (𝜑 → 𝐵 ≠ ∅) |
| diag2f1lem.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) |
| diag2f1lem.g | ⊢ (𝜑 → 𝐺 ∈ (𝑋𝐻𝑌)) |
| Ref | Expression |
|---|---|
| diag2f1lem | ⊢ (𝜑 → (((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = ((𝑋(2nd ‘𝐿)𝑌)‘𝐺) → 𝐹 = 𝐺)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | diag2f1.l | . . . . 5 ⊢ 𝐿 = (𝐶Δfunc𝐷) | |
| 2 | diag2f1.a | . . . . 5 ⊢ 𝐴 = (Base‘𝐶) | |
| 3 | diag2f1.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐷) | |
| 4 | diag2f1.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 5 | diag2f1.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 6 | diag2f1.d | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ Cat) | |
| 7 | diag2f1.x | . . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝐴) | |
| 8 | diag2f1.y | . . . . 5 ⊢ (𝜑 → 𝑌 ∈ 𝐴) | |
| 9 | diag2f1lem.f | . . . . 5 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) | |
| 10 | 1, 2, 3, 4, 5, 6, 7, 8, 9 | diag2 18291 | . . . 4 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = (𝐵 × {𝐹})) |
| 11 | diag2f1lem.g | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ (𝑋𝐻𝑌)) | |
| 12 | 1, 2, 3, 4, 5, 6, 7, 8, 11 | diag2 18291 | . . . 4 ⊢ (𝜑 → ((𝑋(2nd ‘𝐿)𝑌)‘𝐺) = (𝐵 × {𝐺})) |
| 13 | 10, 12 | eqeq12d 2752 | . . 3 ⊢ (𝜑 → (((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = ((𝑋(2nd ‘𝐿)𝑌)‘𝐺) ↔ (𝐵 × {𝐹}) = (𝐵 × {𝐺}))) |
| 14 | diag2f1.0 | . . . 4 ⊢ (𝜑 → 𝐵 ≠ ∅) | |
| 15 | xpcan 6195 | . . . 4 ⊢ (𝐵 ≠ ∅ → ((𝐵 × {𝐹}) = (𝐵 × {𝐺}) ↔ {𝐹} = {𝐺})) | |
| 16 | 14, 15 | syl 17 | . . 3 ⊢ (𝜑 → ((𝐵 × {𝐹}) = (𝐵 × {𝐺}) ↔ {𝐹} = {𝐺})) |
| 17 | 13, 16 | bitrd 279 | . 2 ⊢ (𝜑 → (((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = ((𝑋(2nd ‘𝐿)𝑌)‘𝐺) ↔ {𝐹} = {𝐺})) |
| 18 | sneqrg 4838 | . . 3 ⊢ (𝐹 ∈ (𝑋𝐻𝑌) → ({𝐹} = {𝐺} → 𝐹 = 𝐺)) | |
| 19 | 9, 18 | syl 17 | . 2 ⊢ (𝜑 → ({𝐹} = {𝐺} → 𝐹 = 𝐺)) |
| 20 | 17, 19 | sylbid 240 | 1 ⊢ (𝜑 → (((𝑋(2nd ‘𝐿)𝑌)‘𝐹) = ((𝑋(2nd ‘𝐿)𝑌)‘𝐺) → 𝐹 = 𝐺)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1539 ∈ wcel 2107 ≠ wne 2939 ∅c0 4332 {csn 4625 × cxp 5682 ‘cfv 6560 (class class class)co 7432 2nd c2nd 8014 Basecbs 17248 Hom chom 17309 Catccat 17708 Δfunccdiag 18258 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2707 ax-rep 5278 ax-sep 5295 ax-nul 5305 ax-pow 5364 ax-pr 5431 ax-un 7756 ax-cnex 11212 ax-resscn 11213 ax-1cn 11214 ax-icn 11215 ax-addcl 11216 ax-addrcl 11217 ax-mulcl 11218 ax-mulrcl 11219 ax-mulcom 11220 ax-addass 11221 ax-mulass 11222 ax-distr 11223 ax-i2m1 11224 ax-1ne0 11225 ax-1rid 11226 ax-rnegex 11227 ax-rrecex 11228 ax-cnre 11229 ax-pre-lttri 11230 ax-pre-lttrn 11231 ax-pre-ltadd 11232 ax-pre-mulgt0 11233 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3379 df-reu 3380 df-rab 3436 df-v 3481 df-sbc 3788 df-csb 3899 df-dif 3953 df-un 3955 df-in 3957 df-ss 3967 df-pss 3970 df-nul 4333 df-if 4525 df-pw 4601 df-sn 4626 df-pr 4628 df-tp 4630 df-op 4632 df-uni 4907 df-iun 4992 df-br 5143 df-opab 5205 df-mpt 5225 df-tr 5259 df-id 5577 df-eprel 5583 df-po 5591 df-so 5592 df-fr 5636 df-we 5638 df-xp 5690 df-rel 5691 df-cnv 5692 df-co 5693 df-dm 5694 df-rn 5695 df-res 5696 df-ima 5697 df-pred 6320 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6513 df-fun 6562 df-fn 6563 df-f 6564 df-f1 6565 df-fo 6566 df-f1o 6567 df-fv 6568 df-riota 7389 df-ov 7435 df-oprab 7436 df-mpo 7437 df-om 7889 df-1st 8015 df-2nd 8016 df-frecs 8307 df-wrecs 8338 df-recs 8412 df-rdg 8451 df-1o 8507 df-er 8746 df-map 8869 df-ixp 8939 df-en 8987 df-dom 8988 df-sdom 8989 df-fin 8990 df-pnf 11298 df-mnf 11299 df-xr 11300 df-ltxr 11301 df-le 11302 df-sub 11495 df-neg 11496 df-nn 12268 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12529 df-z 12616 df-dec 12736 df-uz 12880 df-fz 13549 df-struct 17185 df-slot 17220 df-ndx 17232 df-base 17249 df-hom 17322 df-cco 17323 df-cat 17712 df-cid 17713 df-func 17904 df-xpc 18218 df-1stf 18219 df-curf 18260 df-diag 18262 |
| This theorem is referenced by: diag2f1 49027 |
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