Theorem hashimarni 14627

Description: If the size of the image of a one-to-one function 𝐸 under the range of a function 𝐹 which is a one-to-one function into the domain of 𝐸 is a nonnegative integer, the size of the function 𝐹 is the same nonnegative integer. (Contributed by Alexander van der Vekens, 4-Feb-2018.)

Assertion

Ref	Expression
hashimarni	⊢ ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → (♯‘𝐹) = 𝑁))

Proof of Theorem hashimarni

Step	Hyp	Ref	Expression
1		fveqeq2 6925	. . . . . . . 8 ⊢ (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 ↔ (♯‘(𝐸 “ ran 𝐹)) = 𝑁))
2	1	adantl 487	. . . . . . 7 ⊢ (((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘𝑃) = 𝑁 ↔ (♯‘(𝐸 “ ran 𝐹)) = 𝑁))
3		hashimarn 14626	. . . . . . . . . . 11 ⊢ ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 → (♯‘(𝐸 “ ran 𝐹)) = (♯‘𝐹)))
4	3	impcom 413	. . . . . . . . . 10 ⊢ ((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) → (♯‘(𝐸 “ ran 𝐹)) = (♯‘𝐹))
5		id 23	. . . . . . . . . 10 ⊢ ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘(𝐸 “ ran 𝐹)) = 𝑁)
6	4, 5	sylan9req 2819	. . . . . . . . 9 ⊢ (((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ (♯‘(𝐸 “ ran 𝐹)) = 𝑁) → (♯‘𝐹) = 𝑁)
7	6	ex 418	. . . . . . . 8 ⊢ ((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) → ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘𝐹) = 𝑁))
8	7	adantr 486	. . . . . . 7 ⊢ (((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘𝐹) = 𝑁))
9	2, 8	sylbid 243	. . . . . 6 ⊢ (((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ (𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))
10	9	exp31 425	. . . . 5 ⊢ (𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 → ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))))
11	10	com23 87	. . . 4 ⊢ (𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 → (𝑃 = (𝐸 “ ran 𝐹) → ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))))
12	11	com34 92	. . 3 ⊢ (𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 → (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 → ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (♯‘𝐹) = 𝑁))))
13	12	3imp 1128	. 2 ⊢ ((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (♯‘𝐹) = 𝑁))
14	13	com12 33	1 ⊢ ((𝐸:dom 𝐸⟶1-1ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((𝐹:(0..^(♯‘𝐹))⟶1-1dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → (♯‘𝐹) = 𝑁))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147  dom cdm 5658  ran crn 5659   “ cima 5661  ⟶1-1wf1 6563  ‘cfv 6566  (class class class)co 7451  0cc0 11239  ..^cfzo 13828  ♯chash 14515

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-rep 5238  ax-sep 5255  ax-nul 5266  ax-pow 5334  ax-pr 5398  ax-un 7783  ax-cnex 11295  ax-resscn 11296  ax-1cn 11297  ax-icn 11298  ax-addcl 11299  ax-addrcl 11300  ax-mulcl 11301  ax-mulrcl 11302  ax-mulcom 11303  ax-addass 11304  ax-mulass 11305  ax-distr 11306  ax-i2m1 11307  ax-1ne0 11308  ax-1rid 11309  ax-rnegex 11310  ax-rrecex 11311  ax-cnre 11312  ax-pre-lttri 11313  ax-pre-lttrn 11314  ax-pre-ltadd 11315  ax-pre-mulgt0 11316

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-nel 3066  df-ral 3081  df-rex 3091  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-pss 4017  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-int 4913  df-iun 4958  df-br 5109  df-opab 5174  df-mpt 5193  df-tr 5219  df-id 5553  df-eprel 5558  df-po 5566  df-so 5567  df-fr 5611  df-we 5613  df-xp 5664  df-rel 5665  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-res 5670  df-ima 5671  df-pred 6330  df-ord 6391  df-on 6392  df-lim 6393  df-suc 6394  df-iota 6520  df-fun 6568  df-fn 6569  df-f 6570  df-f1 6571  df-fo 6572  df-f1o 6573  df-fv 6574  df-riota 7408  df-ov 7454  df-oprab 7455  df-mpo 7456  df-om 7912  df-2nd 8036  df-frecs 8337  df-wrecs 8368  df-recs 8417  df-rdg 8456  df-1o 8514  df-er 8755  df-en 9012  df-dom 9013  df-sdom 9014  df-fin 9015  df-card 10057  df-pnf 11384  df-mnf 11385  df-xr 11386  df-ltxr 11387  df-le 11388  df-sub 11582  df-neg 11583  df-nn 12376  df-n0 12647  df-z 12734  df-uz 13006  df-hash 14516

This theorem is used by: (None)