[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 30 from proof even-add (previous step)

⊦ (2 * m / 2 + 2 * n / 2) + 2 = m + n, ∃ m0. 2 * m0 = n, ∃ m0. 2 * m0 = m

User applied rule insert elim lemma

And obtained the following new goals

Proof step 31:
⊦ odd(n) → (m = n / 2 ↔ n = m + m + 1)
Proof step 32:
⊦ (2 * m / 2 + 2 * n / 2) + 2 = m + n, odd(n), ∃ m0. 2 * m0 = m, ∃ m0. 2 * m0 = n
Proof step 34:
n = m1 + m1 + 1, odd(n) ⊦ (2 * m / 2 + 2 * m1) + 2 = m + n, ∃ m0. 2 * m0 = m, ∃ m0. 2 * m0 = n

Rule argument

spec: <toplevel> name: div2-elim seq: ⊦ odd(n) → (m = n / 2 ↔ n = m + m + 1) subst: [n, m] → [n, m1]

Additional information

Used terms: n, m1