Theorem srgacl 20223

Description: Closure of the addition operation of a semiring. (Contributed by Mario Carneiro, 14-Jan-2014.) (Revised by Thierry Arnoux, 1-Apr-2018.)

Hypotheses

Ref	Expression
srgacl.b	⊢ 𝐵 = (Base‘𝑅)
srgacl.p	⊢ + = (+g‘𝑅)

Assertion

Ref	Expression
srgacl	⊢ ((𝑅 ∈ SRing ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) ∈ 𝐵)

Proof of Theorem srgacl

Step	Hyp	Ref	Expression
1		srgmnd 20208	. 2 ⊢ (𝑅 ∈ SRing → 𝑅 ∈ Mnd)
2		srgacl.b	. . 3 ⊢ 𝐵 = (Base‘𝑅)
3		srgacl.p	. . 3 ⊢ + = (+g‘𝑅)
4	2, 3	mndcl 18768	. 2 ⊢ ((𝑅 ∈ Mnd ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
5	1, 4	syl3an1 1162	1 ⊢ ((𝑅 ∈ SRing ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + 𝑌) ∈ 𝐵)

Syntax hints:   → wi 4   ∧ w3a 1086   = wceq 1537   ∈ wcel 2106  ‘cfv 6563  (class class class)co 7431  Basecbs 17245  +_gcplusg 17298  Mndcmnd 18760  SRingcsrg 20204

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-ext 2706  ax-nul 5312

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-sb 2063  df-clab 2713  df-cleq 2727  df-clel 2814  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-sbc 3792  df-dif 3966  df-un 3968  df-ss 3980  df-nul 4340  df-if 4532  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-iota 6516  df-fv 6571  df-ov 7434  df-mgm 18666  df-sgrp 18745  df-mnd 18761  df-cmn 19815  df-srg 20205

This theorem is referenced by:  srgcom4lem  20231  srgcom4  20232  srglmhm  20239  srgrmhm  20240  sge0tsms  46336