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Theorem mpidan 420
Description: A deduction which "stacks" a hypothesis. (Contributed by Stanislas Polu, 9-Mar-2020.) (Proof shortened by Wolf Lammen, 28-Mar-2021.)
Hypotheses
Ref Expression
mpidan.1 (𝜑𝜒)
mpidan.2 (((𝜑𝜓) ∧ 𝜒) → 𝜃)
Assertion
Ref Expression
mpidan ((𝜑𝜓) → 𝜃)

Proof of Theorem mpidan
StepHypRef Expression
1 mpidan.1 . . 3 (𝜑𝜒)
21adantr 274 . 2 ((𝜑𝜓) → 𝜒)
3 mpidan.2 . 2 (((𝜑𝜓) ∧ 𝜒) → 𝜃)
42, 3mpdan 418 1 ((𝜑𝜓) → 𝜃)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107
This theorem is referenced by:  sumrbdc  11179  prodrbdclem2  11373  tx2cn  12476  dvaddxxbr  12871  dvmulxxbr  12872
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