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Theorem square-nle-01
⊦ (n * (n + 1)) / 2 ≤ n ↔ n < 2
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
square-nle-01-01
,
Used by units in proved state:
Proof exists?: Yes
View
the proof
Infos about the proof
Proved?: Yes
Interactions: 5
Proof steps: 7
Used lemmas:
div-elim
,
square-ls-02
,
Used spec theorems:
nat-basic1
/
twols-02
Used simplifier rules:
nat-mult
/
rsucc-02
nat-basic1
/
f
nat-basic2
/
z-01
nat-mult
/
two-zero-01
nat
/
lez-01
nat
/
lels-01
nat-basic1
/
one
nat-mult
/
square-even-01
nat-mult
/
mult-a
nat-mult
/
mult-c
nat-basic2
/
a
nat-basic2
/
c
nat-basic2
/
add-base
nat-mult
/
square-two
nat-basic1
/
twols-02