### Nuprl Lemma : rsub-rdiv

`∀[a,b,c:ℝ].  ((b/a) - (c/a)) = (b - c/a) supposing a ≠ r0`

Proof

Definitions occuring in Statement :  rdiv: `(x/y)` rneq: `x ≠ y` rsub: `x - y` req: `x = y` int-to-real: `r(n)` real: `ℝ` uimplies: `b supposing a` uall: `∀[x:A]. B[x]` natural_number: `\$n`
Definitions unfolded in proof :  uall: `∀[x:A]. B[x]` member: `t ∈ T` uimplies: `b supposing a` false: `False` implies: `P `` Q` not: `¬A` rat_term_to_real: `rat_term_to_real(f;t)` rtermDivide: `num "/" denom` rat_term_ind: rat_term_ind rtermSubtract: `left "-" right` rtermVar: `rtermVar(var)` pi1: `fst(t)` and: `P ∧ Q` true: `True` pi2: `snd(t)` prop: `ℙ`
Lemmas referenced :  assert-rat-term-eq2 rtermSubtract_wf rtermDivide_wf rtermVar_wf int-to-real_wf istype-int req_witness rsub_wf rdiv_wf rneq_wf real_wf
Rules used in proof :  sqequalSubstitution sqequalTransitivity computationStep sqequalReflexivity isect_memberFormation_alt introduction cut extract_by_obid sqequalHypSubstitution isectElimination thin natural_numberEquality hypothesis lambdaEquality_alt int_eqEquality hypothesisEquality independent_isectElimination approximateComputation sqequalRule independent_pairFormation independent_functionElimination universeIsType isect_memberEquality_alt because_Cache isectIsTypeImplies inhabitedIsType

Latex:
\mforall{}[a,b,c:\mBbbR{}].    ((b/a)  -  (c/a))  =  (b  -  c/a)  supposing  a  \mneq{}  r0

Date html generated: 2019_10_29-AM-09_56_39
Last ObjectModification: 2019_04_01-PM-07_08_32

Theory : reals

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