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lemma

zero

proved
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module
IndisputableMonolith.RecogSpec.Core
domain
RecogSpec
line
68 · github
papers citing
none yet

open explainer

Generate a durable explainer page for this declaration.

open lean source

IndisputableMonolith.RecogSpec.Core on GitHub at line 68.

browse module

All declarations in this module, on Recognition.

explainer page

Tracked in the explainer inventory; generation is lazy so crawlers do not trigger LLM jobs.

open explainer

depends on

formal source

  65  change ((algebraMap ℚ ℝ) q) ∈ phiSubfield φ
  66  simpa using (phiSubfield φ).algebraMap_mem q
  67
  68lemma zero (φ : ℝ) : PhiClosed φ (0 : ℝ) :=
  69  (phiSubfield φ).zero_mem
  70
  71lemma one (φ : ℝ) : PhiClosed φ (1 : ℝ) :=
  72  (phiSubfield φ).one_mem
  73
  74lemma add (hx : PhiClosed φ x) (hy : PhiClosed φ y) :
  75    PhiClosed φ (x + y) :=
  76  (phiSubfield φ).add_mem hx hy
  77
  78lemma sub (hx : PhiClosed φ x) (hy : PhiClosed φ y) :
  79    PhiClosed φ (x - y) :=
  80  (phiSubfield φ).sub_mem hx hy
  81
  82lemma neg (hx : PhiClosed φ x) : PhiClosed φ (-x) :=
  83  (phiSubfield φ).neg_mem hx
  84
  85lemma mul (hx : PhiClosed φ x) (hy : PhiClosed φ y) :
  86    PhiClosed φ (x * y) :=
  87  (phiSubfield φ).mul_mem hx hy
  88
  89lemma inv (hx : PhiClosed φ x) : PhiClosed φ x⁻¹ :=
  90  (phiSubfield φ).inv_mem hx
  91
  92lemma div (hx : PhiClosed φ x) (hy : PhiClosed φ y) :
  93    PhiClosed φ (x / y) :=
  94  (phiSubfield φ).div_mem hx hy
  95
  96lemma pow (hx : PhiClosed φ x) (n : ℕ) : PhiClosed φ (x ^ n) := by
  97  simpa using (phiSubfield φ).pow_mem hx n
  98