metcnpd - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > metcnpd		GIF version

Theorem metcnpd 15511

Description: Two ways to say a mapping from metric 𝐶 to metric 𝐷 is continuous at point 𝑃. (Contributed by Jim Kingdon, 14-Jun-2023.)

**Hypotheses**
Ref	Expression
metcnpd.j	⊢ (𝜑 → 𝐽 = (MetOpen‘𝐶))
metcnpd.k	⊢ (𝜑 → 𝐾 = (MetOpen‘𝐷))
metcnpd.c	⊢ (𝜑 → 𝐶 ∈ (∞Met‘𝑋))
metcnpd.d	⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑌))
metcnpd.p	⊢ (𝜑 → 𝑃 ∈ 𝑋)

**Assertion**
Ref	Expression
metcnpd	⊢ (𝜑 → (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) ↔ (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝑋 ((𝑃𝐶𝑤) < 𝑧 → ((𝐹‘𝑃)𝐷(𝐹‘𝑤)) < 𝑦))))

Distinct variable groups: 𝑤,𝐶,𝑦,𝑧 𝑤,𝐷,𝑦,𝑧 𝑤,𝐹,𝑦,𝑧 𝑤,𝑃,𝑦,𝑧 𝑤,𝑋,𝑦,𝑧 𝑤,𝑌,𝑦,𝑧 Allowed substitution hints: 𝜑(𝑦,𝑧,𝑤) 𝐽(𝑦,𝑧,𝑤) 𝐾(𝑦,𝑧,𝑤)

**Proof of Theorem metcnpd**
Step	Hyp	Ref	Expression
1		metcnpd.j	. . . . 5 ⊢ (𝜑 → 𝐽 = (MetOpen‘𝐶))
2		metcnpd.k	. . . . 5 ⊢ (𝜑 → 𝐾 = (MetOpen‘𝐷))
3	1, 2	oveq12d 6076	. . . 4 ⊢ (𝜑 → (𝐽 CnP 𝐾) = ((MetOpen‘𝐶) CnP (MetOpen‘𝐷)))
4	3	fveq1d 5677	. . 3 ⊢ (𝜑 → ((𝐽 CnP 𝐾)‘𝑃) = (((MetOpen‘𝐶) CnP (MetOpen‘𝐷))‘𝑃))
5	4	eleq2d 2304	. 2 ⊢ (𝜑 → (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) ↔ 𝐹 ∈ (((MetOpen‘𝐶) CnP (MetOpen‘𝐷))‘𝑃)))
6		metcnpd.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ (∞Met‘𝑋))
7		metcnpd.d	. . 3 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑌))
8		metcnpd.p	. . 3 ⊢ (𝜑 → 𝑃 ∈ 𝑋)
9		eqid 2234	. . . 4 ⊢ (MetOpen‘𝐶) = (MetOpen‘𝐶)
10		eqid 2234	. . . 4 ⊢ (MetOpen‘𝐷) = (MetOpen‘𝐷)
11	9, 10	metcnp 15503	. . 3 ⊢ ((𝐶 ∈ (∞Met‘𝑋) ∧ 𝐷 ∈ (∞Met‘𝑌) ∧ 𝑃 ∈ 𝑋) → (𝐹 ∈ (((MetOpen‘𝐶) CnP (MetOpen‘𝐷))‘𝑃) ↔ (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝑋 ((𝑃𝐶𝑤) < 𝑧 → ((𝐹‘𝑃)𝐷(𝐹‘𝑤)) < 𝑦))))
12	6, 7, 8, 11	syl3anc 1274	. 2 ⊢ (𝜑 → (𝐹 ∈ (((MetOpen‘𝐶) CnP (MetOpen‘𝐷))‘𝑃) ↔ (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝑋 ((𝑃𝐶𝑤) < 𝑧 → ((𝐹‘𝑃)𝐷(𝐹‘𝑤)) < 𝑦))))
13	5, 12	bitrd 188	1 ⊢ (𝜑 → (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝑃) ↔ (𝐹:𝑋⟶𝑌 ∧ ∀𝑦 ∈ ℝ⁺ ∃𝑧 ∈ ℝ⁺ ∀𝑤 ∈ 𝑋 ((𝑃𝐶𝑤) < 𝑧 → ((𝐹‘𝑃)𝐷(𝐹‘𝑤)) < 𝑦))))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2205 ∀wral 2522 ∃wrex 2523 class class class wbr 4114 ⟶wf 5353 ‘cfv 5357 (class class class)co 6058 < clt 8324 ℝ⁺crp 10004 ∞Metcxmet 14810 MetOpencmopn 14815 CnP ccnp 15177

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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-mulrcl 8242 ax-addcom 8243 ax-mulcom 8244 ax-addass 8245 ax-mulass 8246 ax-distr 8247 ax-i2m1 8248 ax-0lt1 8249 ax-1rid 8250 ax-0id 8251 ax-rnegex 8252 ax-precex 8253 ax-cnre 8254 ax-pre-ltirr 8255 ax-pre-ltwlin 8256 ax-pre-lttrn 8257 ax-pre-apti 8258 ax-pre-ltadd 8259 ax-pre-mulgt0 8260 ax-pre-mulext 8261 ax-arch 8262 ax-caucvg 8263

This theorem depends on definitions: df-bi 117 df-stab 839 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-if 3625 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-id 4419 df-po 4422 df-iso 4423 df-iord 4492 df-on 4494 df-ilim 4495 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-isom 5366 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-recs 6549 df-frec 6635 df-map 6897 df-sup 7288 df-inf 7289 df-pnf 8326 df-mnf 8327 df-xr 8328 df-ltxr 8329 df-le 8330 df-sub 8462 df-neg 8463 df-reap 8866 df-ap 8873 df-div 8964 df-inn 9255 df-2 9313 df-3 9314 df-4 9315 df-n0 9514 df-z 9595 df-uz 9872 df-q 9970 df-rp 10005 df-xneg 10124 df-xadd 10125 df-seqfrec 10834 df-exp 10925 df-cj 11552 df-re 11553 df-im 11554 df-rsqrt 11708 df-abs 11709 df-topgen 13557 df-psmet 14817 df-xmet 14818 df-bl 14820 df-mopn 14821 df-top 14989 df-topon 15002 df-bases 15034 df-cnp 15180

This theorem is referenced by: cnplimcim 15658 limccnpcntop 15666

W3C validator