Theorem rngmgpf 20226

Description: Restricted functionality of the multiplicative group on non-unital rings (mgpf 20321 analog). (Contributed by AV, 22-Feb-2025.)

Assertion

Ref	Expression
rngmgpf	⊢ (mulGrp ↾ Rng):Rng⟶Smgrp

Proof of Theorem rngmgpf

Step	Hyp	Ref	Expression
1		fnmgp 20209	. . 3 ⊢ mulGrp Fn V
2		ssv 3963	. . 3 ⊢ Rng ⊆ V
3		fnssres 6648	. . 3 ⊢ ((mulGrp Fn V ∧ Rng ⊆ V) → (mulGrp ↾ Rng) Fn Rng)
4	1, 2, 3	mp2an 704	. 2 ⊢ (mulGrp ↾ Rng) Fn Rng
5		fvres 6890	. . . 4 ⊢ (𝑎 ∈ Rng → ((mulGrp ↾ Rng)‘𝑎) = (mulGrp‘𝑎))
6		eqid 2765	. . . . 5 ⊢ (mulGrp‘𝑎) = (mulGrp‘𝑎)
7	6	rngmgp 20225	. . . 4 ⊢ (𝑎 ∈ Rng → (mulGrp‘𝑎) ∈ Smgrp)
8	5, 7	eqeltrd 2865	. . 3 ⊢ (𝑎 ∈ Rng → ((mulGrp ↾ Rng)‘𝑎) ∈ Smgrp)
9	8	rgen 3081	. 2 ⊢ ∀𝑎 ∈ Rng ((mulGrp ↾ Rng)‘𝑎) ∈ Smgrp
10		ffnfv 7104	. 2 ⊢ ((mulGrp ↾ Rng):Rng⟶Smgrp ↔ ((mulGrp ↾ Rng) Fn Rng ∧ ∀𝑎 ∈ Rng ((mulGrp ↾ Rng)‘𝑎) ∈ Smgrp))
11	4, 9, 10	mpbir2an 723	1 ⊢ (mulGrp ↾ Rng):Rng⟶Smgrp

Syntax hints:   ∈ wcel 2145  ∀wral 3079  Vcvv 3457   ⊆ wss 3907   ↾ cres 5654   Fn wfn 6520  ⟶wf 6521  ‘cfv 6525  Smgrpcsgrp 18766  mulGrpcmgp 20207  Rngcrng 20221

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pr 5395

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-sbc 3748  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-mpt 5187  df-id 5547  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-rn 5663  df-res 5664  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-fv 6533  df-ov 7403  df-mgp 20208  df-rng 20222

This theorem is referenced by:  prdsrngd  20245