Step
*
of Lemma
rneq-zero
∀x:ℝ. (x ≠ r0
⇐⇒ rpositive(x) ∨ rpositive(-(x)))
BY
{ ((RepUR ``rneq rless rpositive rminus int-to-real`` 0 THEN Auto)
THEN (D -1 THENL [OrRight; OrLeft])
THEN Auto
THEN ParallelLast
THEN Auto') }
Latex:
Latex:
\mforall{}x:\mBbbR{}. (x \mneq{} r0 \mLeftarrow{}{}\mRightarrow{} rpositive(x) \mvee{} rpositive(-(x)))
By
Latex:
((RepUR ``rneq rless rpositive rminus int-to-real`` 0 THEN Auto)
THEN (D -1 THENL [OrRight; OrLeft])
THEN Auto
THEN ParallelLast
THEN Auto')
Home
Index