bdmetval - Intuitionistic Logic Explorer

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Theorem bdmetval 14736

Description: Value of the standard bounded metric. (Contributed by Mario Carneiro, 26-Aug-2015.) (Revised by Jim Kingdon, 9-May-2023.)

**Hypothesis**
Ref	Expression
stdbdmet.1	⊢ 𝐷 = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ inf({(𝑥𝐶𝑦), 𝑅}, ℝ^*, < ))

**Assertion**
Ref	Expression
bdmetval	⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐴𝐷𝐵) = inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ))

Distinct variable groups: 𝑥,𝑦,𝐴 𝑥,𝐶,𝑦 𝑥,𝐵,𝑦 𝑥,𝑅,𝑦 𝑥,𝑋,𝑦 Allowed substitution hints: 𝐷(𝑥,𝑦)

**Proof of Theorem bdmetval**
Step	Hyp	Ref	Expression
1		simprl 529	. 2 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^*) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → 𝐴 ∈ 𝑋)
2		simprr 531	. 2 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^*) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → 𝐵 ∈ 𝑋)
3		simpll 527	. . . 4 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → 𝐶:(𝑋 × 𝑋)⟶ℝ^)
4	3, 1, 2	fovcdmd 6068	. . 3 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐴𝐶𝐵) ∈ ℝ^)
5		simplr 528	. . 3 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → 𝑅 ∈ ℝ^)
6		xrmincl 11431	. . 3 ⊢ (((𝐴𝐶𝐵) ∈ ℝ^* ∧ 𝑅 ∈ ℝ^) → inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ) ∈ ℝ^*)
7	4, 5, 6	syl2anc 411	. 2 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ) ∈ ℝ^*)
8		oveq12 5931	. . . . 5 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → (𝑥𝐶𝑦) = (𝐴𝐶𝐵))
9	8	preq1d 3705	. . . 4 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → {(𝑥𝐶𝑦), 𝑅} = {(𝐴𝐶𝐵), 𝑅})
10	9	infeq1d 7078	. . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → inf({(𝑥𝐶𝑦), 𝑅}, ℝ^, < ) = inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ))
11		stdbdmet.1	. . 3 ⊢ 𝐷 = (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ inf({(𝑥𝐶𝑦), 𝑅}, ℝ^*, < ))
12	10, 11	ovmpoga 6052	. 2 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋 ∧ inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ) ∈ ℝ^) → (𝐴𝐷𝐵) = inf({(𝐴𝐶𝐵), 𝑅}, ℝ^*, < ))
13	1, 2, 7, 12	syl3anc 1249	1 ⊢ (((𝐶:(𝑋 × 𝑋)⟶ℝ^* ∧ 𝑅 ∈ ℝ^) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐴𝐷𝐵) = inf({(𝐴𝐶𝐵), 𝑅}, ℝ^, < ))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2167 {cpr 3623 × cxp 4661 ⟶wf 5254 (class class class)co 5922 ∈ cmpo 5924 infcinf 7049 ℝ^*cxr 8060 < clt 8061

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4148 ax-sep 4151 ax-nul 4159 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-setind 4573 ax-iinf 4624 ax-cnex 7970 ax-resscn 7971 ax-1cn 7972 ax-1re 7973 ax-icn 7974 ax-addcl 7975 ax-addrcl 7976 ax-mulcl 7977 ax-mulrcl 7978 ax-addcom 7979 ax-mulcom 7980 ax-addass 7981 ax-mulass 7982 ax-distr 7983 ax-i2m1 7984 ax-0lt1 7985 ax-1rid 7986 ax-0id 7987 ax-rnegex 7988 ax-precex 7989 ax-cnre 7990 ax-pre-ltirr 7991 ax-pre-ltwlin 7992 ax-pre-lttrn 7993 ax-pre-apti 7994 ax-pre-ltadd 7995 ax-pre-mulgt0 7996 ax-pre-mulext 7997 ax-arch 7998 ax-caucvg 7999

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3451 df-if 3562 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-int 3875 df-iun 3918 df-br 4034 df-opab 4095 df-mpt 4096 df-tr 4132 df-id 4328 df-po 4331 df-iso 4332 df-iord 4401 df-on 4403 df-ilim 4404 df-suc 4406 df-iom 4627 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-ima 4676 df-iota 5219 df-fun 5260 df-fn 5261 df-f 5262 df-f1 5263 df-fo 5264 df-f1o 5265 df-fv 5266 df-isom 5267 df-riota 5877 df-ov 5925 df-oprab 5926 df-mpo 5927 df-1st 6198 df-2nd 6199 df-recs 6363 df-frec 6449 df-sup 7050 df-inf 7051 df-pnf 8063 df-mnf 8064 df-xr 8065 df-ltxr 8066 df-le 8067 df-sub 8199 df-neg 8200 df-reap 8602 df-ap 8609 df-div 8700 df-inn 8991 df-2 9049 df-3 9050 df-4 9051 df-n0 9250 df-z 9327 df-uz 9602 df-rp 9729 df-xneg 9847 df-seqfrec 10540 df-exp 10631 df-cj 11007 df-re 11008 df-im 11009 df-rsqrt 11163 df-abs 11164

This theorem is referenced by: bdbl 14739

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