[數撚圍爐區] 毅進制是怎樣運作的? (16)

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2019-08-02 13:29:40

佢prove existence 果度,點解S唔洗細過b? 跟住佢put k=2a證S exists。。。a-2ab仲點會細過b
2019-08-02 13:42:29
S 係一個 set,點樣細過b?
2019-08-02 13:53:30
你講 a-bk 唔使細過 b?因為本身就係要 prove existence,如果加埋個 a-bk<b 嘅話 S non-empty 已經唔使做(而要證 S non-empty 本身就係 prove existence)。
2019-08-02 13:56:04
a-2ab 只係 show S non-empty
2019-08-02 14:04:39
a-2ab 點解要細過b?個argument係 1-2b < 0 then a*(1-2b) > 0 then a - b*2a > 0 so a - b*2a ∈ S
同埋唔係證S exist,係證S non empty
2019-08-02 14:10:00

佢prove existence 果度,點解S唔洗細過b? 跟住佢put k=2a證S exists。。。a-2ab仲點會細過b
a-2ab 點解要細過b?個argument係 1-2b < 0 then a*(1-2b) > 0 then a - b*2a > 0 so a - b*2a ∈ S
同埋唔係證S exist,係證S non empty

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