Theorem hashimarni 14343

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–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → (♯‘𝐹) = 𝑁))

Proof of Theorem hashimarni

Step	Hyp	Ref	Expression
1		fveqeq2 6826	. . . . . . . 8 ⊢ (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 ↔ (♯‘(𝐸 “ ran 𝐹)) = 𝑁))
2	1	adantl 481	. . . . . . 7 ⊢ (((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘𝑃) = 𝑁 ↔ (♯‘(𝐸 “ ran 𝐹)) = 𝑁))
3		hashimarn 14342	. . . . . . . . . . 11 ⊢ ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 → (♯‘(𝐸 “ ran 𝐹)) = (♯‘𝐹)))
4	3	impcom 407	. . . . . . . . . 10 ⊢ ((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) → (♯‘(𝐸 “ ran 𝐹)) = (♯‘𝐹))
5		id 22	. . . . . . . . . 10 ⊢ ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘(𝐸 “ ran 𝐹)) = 𝑁)
6	4, 5	sylan9req 2787	. . . . . . . . 9 ⊢ (((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ (♯‘(𝐸 “ ran 𝐹)) = 𝑁) → (♯‘𝐹) = 𝑁)
7	6	ex 412	. . . . . . . 8 ⊢ ((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) → ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘𝐹) = 𝑁))
8	7	adantr 480	. . . . . . 7 ⊢ (((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘(𝐸 “ ran 𝐹)) = 𝑁 → (♯‘𝐹) = 𝑁))
9	2, 8	sylbid 240	. . . . . 6 ⊢ (((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ (𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉)) ∧ 𝑃 = (𝐸 “ ran 𝐹)) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))
10	9	exp31 419	. . . . 5 ⊢ (𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 → ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))))
11	10	com23 86	. . . 4 ⊢ (𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 → (𝑃 = (𝐸 “ ran 𝐹) → ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((♯‘𝑃) = 𝑁 → (♯‘𝐹) = 𝑁))))
12	11	com34 91	. . 3 ⊢ (𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 → (𝑃 = (𝐸 “ ran 𝐹) → ((♯‘𝑃) = 𝑁 → ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (♯‘𝐹) = 𝑁))))
13	12	3imp 1110	. 2 ⊢ ((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → (♯‘𝐹) = 𝑁))
14	13	com12 32	1 ⊢ ((𝐸:dom 𝐸–1-1→ran 𝐸 ∧ 𝐸 ∈ 𝑉) → ((𝐹:(0..^(♯‘𝐹))–1-1→dom 𝐸 ∧ 𝑃 = (𝐸 “ ran 𝐹) ∧ (♯‘𝑃) = 𝑁) → (♯‘𝐹) = 𝑁))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1541   ∈ wcel 2111  dom cdm 5611  ran crn 5612   “ cima 5614  –1-1→wf1 6473  ‘cfv 6476  (class class class)co 7341  0cc0 11001  ..^cfzo 13549  ♯chash 14232

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-rep 5212  ax-sep 5229  ax-nul 5239  ax-pow 5298  ax-pr 5365  ax-un 7663  ax-cnex 11057  ax-resscn 11058  ax-1cn 11059  ax-icn 11060  ax-addcl 11061  ax-addrcl 11062  ax-mulcl 11063  ax-mulrcl 11064  ax-mulcom 11065  ax-addass 11066  ax-mulass 11067  ax-distr 11068  ax-i2m1 11069  ax-1ne0 11070  ax-1rid 11071  ax-rnegex 11072  ax-rrecex 11073  ax-cnre 11074  ax-pre-lttri 11075  ax-pre-lttrn 11076  ax-pre-ltadd 11077  ax-pre-mulgt0 11078

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-nel 3033  df-ral 3048  df-rex 3057  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4279  df-if 4471  df-pw 4547  df-sn 4572  df-pr 4574  df-op 4578  df-uni 4855  df-int 4893  df-iun 4938  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5506  df-eprel 5511  df-po 5519  df-so 5520  df-fr 5564  df-we 5566  df-xp 5617  df-rel 5618  df-cnv 5619  df-co 5620  df-dm 5621  df-rn 5622  df-res 5623  df-ima 5624  df-pred 6243  df-ord 6304  df-on 6305  df-lim 6306  df-suc 6307  df-iota 6432  df-fun 6478  df-fn 6479  df-f 6480  df-f1 6481  df-fo 6482  df-f1o 6483  df-fv 6484  df-riota 7298  df-ov 7344  df-oprab 7345  df-mpo 7346  df-om 7792  df-2nd 7917  df-frecs 8206  df-wrecs 8237  df-recs 8286  df-rdg 8324  df-1o 8380  df-er 8617  df-en 8865  df-dom 8866  df-sdom 8867  df-fin 8868  df-card 9827  df-pnf 11143  df-mnf 11144  df-xr 11145  df-ltxr 11146  df-le 11147  df-sub 11341  df-neg 11342  df-nn 12121  df-n0 12377  df-z 12464  df-uz 12728  df-hash 14233

This theorem is referenced by: (None)