fullthinc - Mathbox for Zhi Wang

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Theorem fullthinc 47666

Description: A functor to a thin category is full iff empty hom-sets are mapped to empty hom-sets. (Contributed by Zhi Wang, 1-Oct-2024.)

**Hypotheses**
Ref	Expression
fullthinc.b	⊢ 𝐵 = (Base‘𝐶)
fullthinc.j	⊢ 𝐽 = (Hom ‘𝐷)
fullthinc.h	⊢ 𝐻 = (Hom ‘𝐶)
fullthinc.d	⊢ (𝜑 → 𝐷 ∈ ThinCat)
fullthinc.f	⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺)

**Assertion**
Ref	Expression
fullthinc	⊢ (𝜑 → (𝐹(𝐶 Full 𝐷)𝐺 ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)))

Distinct variable groups: 𝑥,𝐵,𝑦 𝑥,𝐶,𝑦 𝑥,𝐷,𝑦 𝑥,𝐹,𝑦 𝑥,𝐺,𝑦 𝑥,𝐻,𝑦 𝑥,𝐽,𝑦 Allowed substitution hints: 𝜑(𝑥,𝑦)

Proof of Theorem fullthinc Dummy variable 𝑓 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		fullthinc.d	. 2 ⊢ (𝜑 → 𝐷 ∈ ThinCat)
2		fullthinc.f	. 2 ⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺)
3		fullthinc.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝐶)
4		fullthinc.j	. . . . . 6 ⊢ 𝐽 = (Hom ‘𝐷)
5		fullthinc.h	. . . . . 6 ⊢ 𝐻 = (Hom ‘𝐶)
6	3, 4, 5	isfull2 17862	. . . . 5 ⊢ (𝐹(𝐶 Full 𝐷)𝐺 ↔ (𝐹(𝐶 Func 𝐷)𝐺 ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
7		foeq2 6803	. . . . . . . 8 ⊢ ((𝑥𝐻𝑦) = ∅ → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ (𝑥𝐺𝑦):∅–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
8		fo00 6870	. . . . . . . . 9 ⊢ ((𝑥𝐺𝑦):∅–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ ((𝑥𝐺𝑦) = ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
9	8	simprbi 498	. . . . . . . 8 ⊢ ((𝑥𝐺𝑦):∅–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)
10	7, 9	syl6bi 253	. . . . . . 7 ⊢ ((𝑥𝐻𝑦) = ∅ → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
11	10	com12 32	. . . . . 6 ⊢ ((𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) → ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
12	11	2ralimi 3124	. . . . 5 ⊢ (∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
13	6, 12	simplbiim 506	. . . 4 ⊢ (𝐹(𝐶 Full 𝐷)𝐺 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
14	13	adantl 483	. . 3 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ 𝐹(𝐶 Full 𝐷)𝐺) → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
15		simplr 768	. . . 4 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → 𝐹(𝐶 Func 𝐷)𝐺)
16		imor 852	. . . . . . . 8 ⊢ (((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) ↔ (¬ (𝑥𝐻𝑦) = ∅ ∨ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅))
17		simplr 768	. . . . . . . . . . . . . . . 16 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → 𝐹(𝐶 Func 𝐷)𝐺)
18		simprl 770	. . . . . . . . . . . . . . . 16 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → 𝑥 ∈ 𝐵)
19		simprr 772	. . . . . . . . . . . . . . . 16 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → 𝑦 ∈ 𝐵)
20	3, 5, 4, 17, 18, 19	funcf2 17818	. . . . . . . . . . . . . . 15 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
21	20	adantr 482	. . . . . . . . . . . . . 14 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
22		simpr 486	. . . . . . . . . . . . . . 15 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → ¬ (𝑥𝐻𝑦) = ∅)
23	22	neqned 2948	. . . . . . . . . . . . . 14 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝑥𝐻𝑦) ≠ ∅)
24		fdomne0 47516	. . . . . . . . . . . . . 14 ⊢ (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐻𝑦) ≠ ∅) → ((𝑥𝐺𝑦) ≠ ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ≠ ∅))
25	21, 23, 24	syl2anc 585	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → ((𝑥𝐺𝑦) ≠ ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ≠ ∅))
26	25	simprd 497	. . . . . . . . . . . 12 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ≠ ∅)
27		simplll 774	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝐷 ∈ ThinCat)
28		eqid 2733	. . . . . . . . . . . . . . 15 ⊢ (Base‘𝐷) = (Base‘𝐷)
29	17	adantr 482	. . . . . . . . . . . . . . 15 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝐹(𝐶 Func 𝐷)𝐺)
30	3, 28, 29	funcf1 17816	. . . . . . . . . . . . . 14 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝐹:𝐵⟶(Base‘𝐷))
31	18	adantr 482	. . . . . . . . . . . . . 14 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝑥 ∈ 𝐵)
32	30, 31	ffvelcdmd 7088	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝐹‘𝑥) ∈ (Base‘𝐷))
33	19	adantr 482	. . . . . . . . . . . . . 14 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝑦 ∈ 𝐵)
34	30, 33	ffvelcdmd 7088	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝐹‘𝑦) ∈ (Base‘𝐷))
35		eqidd 2734	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (Base‘𝐷) = (Base‘𝐷))
36	4	a1i 11	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → 𝐽 = (Hom ‘𝐷))
37	27, 32, 34, 35, 36	thincn0eu 47652	. . . . . . . . . . . 12 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ≠ ∅ ↔ ∃!𝑓 𝑓 ∈ ((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
38	26, 37	mpbid 231	. . . . . . . . . . 11 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → ∃!𝑓 𝑓 ∈ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
39		eusn 4735	. . . . . . . . . . 11 ⊢ (∃!𝑓 𝑓 ∈ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ ∃𝑓((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓})
40	38, 39	sylib 217	. . . . . . . . . 10 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → ∃𝑓((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓})
41	25	simpld 496	. . . . . . . . . 10 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝑥𝐺𝑦) ≠ ∅)
42		foconst 6821	. . . . . . . . . . . . 13 ⊢ (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶{𝑓} ∧ (𝑥𝐺𝑦) ≠ ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→{𝑓})
43		feq3 6701	. . . . . . . . . . . . . . 15 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶{𝑓}))
44	43	anbi1d 631	. . . . . . . . . . . . . 14 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐺𝑦) ≠ ∅) ↔ ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶{𝑓} ∧ (𝑥𝐺𝑦) ≠ ∅)))
45		foeq3 6804	. . . . . . . . . . . . . 14 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→{𝑓}))
46	44, 45	imbi12d 345	. . . . . . . . . . . . 13 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → ((((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐺𝑦) ≠ ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))) ↔ (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶{𝑓} ∧ (𝑥𝐺𝑦) ≠ ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→{𝑓})))
47	42, 46	mpbiri 258	. . . . . . . . . . . 12 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐺𝑦) ≠ ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
48	47	exlimiv 1934	. . . . . . . . . . 11 ⊢ (∃𝑓((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} → (((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐺𝑦) ≠ ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
49	48	imp 408	. . . . . . . . . 10 ⊢ ((∃𝑓((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = {𝑓} ∧ ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ∧ (𝑥𝐺𝑦) ≠ ∅)) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
50	40, 21, 41, 49	syl12anc 836	. . . . . . . . 9 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ¬ (𝑥𝐻𝑦) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
51	20	adantr 482	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
52		feq3 6701	. . . . . . . . . . . . . 14 ⊢ (((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅ → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶∅))
53	52	adantl 483	. . . . . . . . . . . . 13 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶((𝐹‘𝑥)𝐽(𝐹‘𝑦)) ↔ (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶∅))
54	51, 53	mpbid 231	. . . . . . . . . . . 12 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶∅)
55		f00 6774	. . . . . . . . . . . 12 ⊢ ((𝑥𝐺𝑦):(𝑥𝐻𝑦)⟶∅ ↔ ((𝑥𝐺𝑦) = ∅ ∧ (𝑥𝐻𝑦) = ∅))
56	54, 55	sylib 217	. . . . . . . . . . 11 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → ((𝑥𝐺𝑦) = ∅ ∧ (𝑥𝐻𝑦) = ∅))
57	56	simprd 497	. . . . . . . . . 10 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐻𝑦) = ∅)
58	56	simpld 496	. . . . . . . . . 10 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦) = ∅)
59		simpr 486	. . . . . . . . . 10 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)
60	8	biimpri 227	. . . . . . . . . . . 12 ⊢ (((𝑥𝐺𝑦) = ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):∅–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
61	60, 7	imbitrrid 245	. . . . . . . . . . 11 ⊢ ((𝑥𝐻𝑦) = ∅ → (((𝑥𝐺𝑦) = ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
62	61	imp 408	. . . . . . . . . 10 ⊢ (((𝑥𝐻𝑦) = ∅ ∧ ((𝑥𝐺𝑦) = ∅ ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
63	57, 58, 59, 62	syl12anc 836	. . . . . . . . 9 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
64	50, 63	jaodan 957	. . . . . . . 8 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ (¬ (𝑥𝐻𝑦) = ∅ ∨ ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
65	16, 64	sylan2b 595	. . . . . . 7 ⊢ ((((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) ∧ ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
66	65	ex 414	. . . . . 6 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
67	66	ralimdvva 3205	. . . . 5 ⊢ ((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) → (∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅) → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦))))
68	67	imp 408	. . . 4 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥𝐺𝑦):(𝑥𝐻𝑦)–onto→((𝐹‘𝑥)𝐽(𝐹‘𝑦)))
69	15, 68, 6	sylanbrc 584	. . 3 ⊢ (((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)) → 𝐹(𝐶 Full 𝐷)𝐺)
70	14, 69	impbida 800	. 2 ⊢ ((𝐷 ∈ ThinCat ∧ 𝐹(𝐶 Func 𝐷)𝐺) → (𝐹(𝐶 Full 𝐷)𝐺 ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)))
71	1, 2, 70	syl2anc 585	1 ⊢ (𝜑 → (𝐹(𝐶 Full 𝐷)𝐺 ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ((𝑥𝐻𝑦) = ∅ → ((𝐹‘𝑥)𝐽(𝐹‘𝑦)) = ∅)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 ∨ wo 846 = wceq 1542 ∃wex 1782 ∈ wcel 2107 ∃!weu 2563 ≠ wne 2941 ∀wral 3062 ∅c0 4323 {csn 4629 class class class wbr 5149 ⟶wf 6540 –onto→wfo 6542 ‘cfv 6544 (class class class)co 7409 Basecbs 17144 Hom chom 17208 Func cfunc 17804 Full cful 17853 ThinCatcthinc 47639

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-id 5575 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-ov 7412 df-oprab 7413 df-mpo 7414 df-1st 7975 df-2nd 7976 df-map 8822 df-ixp 8892 df-func 17808 df-full 17855 df-thinc 47640

This theorem is referenced by: fullthinc2 47667 thincciso 47669

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