Video: Puas yog cov kab sib txuas tsis tau ntsib?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Parallel kab tsis sib ntsib ntawm ib qho chaw. Ntu no ntawm Wikipedia muaj nqis heev ntawm no: Hauv geometry, sib npaug yog kab hauv ib lub dav hlau uas tsis ntsib yog, ob kab hauv ib lub dav hlau uas tsis txhob intersector kov ib leeg ntawm txhua qhov chaw tau hais tias yog thaum uas tig mus.
Raws li txoj cai, ob kab tsis tuaj yeem sib ntsib thiab tsis sib npaug?
Yog ob kab hauv ib lub dav hlau tsis txhob kev sib tshuam, lawv yog thaum uas tig mus . Yog ob kab hauv qhov chaw thiab tsis yog nyob rau hauv tib lub dav hlau tsis txhob intersect, lawv yog skew. Cov lus teb yog yog. Ob kab tuaj yeem tsuas yog benon-kev sib tshuam yog tias lawv txoj kab nqes raws nraim tib yam (tsis li ntawd lawv yuav tau hla ntawm qee qhov taw tes).
Tsis tas li ntawd, cov kab sib txuas puas cuam tshuam rau ntawm tus kheej? Parallel kab ua tsis muaj nyob hauv kheej kheej geometry. Tej yam ncaj kab los ntawm qhov point P ntawm a kheej kheej yog los ntawm txhais lub voj voog loj. Ob lub voj voog loj yuav sib tshuam ntawm ob lub ntsiab lus ntawm ib ntu Euclidean, uas yog txoj kab uas hla kheej kheej . Tsis muaj sib npaug hauv kheej kheej geometry.
Ntawm no, pes tsawg zaus ob kab sib npaug tuaj yeem sib ntsib?
Ob kab sib npaug yuav hla raws nraim ib zaug ntawm kab ntawm infinity - dua peb pom ob dluab ntawm uas hla thaum peb tig ib ncig, tab sis lawv yog los ntawm txhais tib lub ntsiab lus. Thiab tej kab hauv lub dav hlau yuav hla tus kab ntawm infinity ib zaug.
Puas yog cov kab sib txuas ua ke ntawm infinity?
Hauv qhov projective geometry, ib khub ntawm kab ib txwm cuam tshuam ntawm qee qhov chaw, tab sis parallel kab ua tsis sib tshuam hauv lub dav hlau tiag. Cov kab ntawm tsis kawg isadded rau lub dav hlau tiag. Qhov no ua tiav lub dav hlau, vim tam sim no kab sib npaug sib tshuam ntawm ib qho chaw uas nyob rau ntawm kab ntawm tsis kawg.
Pom zoo:
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Tiag tiag cov kab sib txuas tsis tuaj yeem sib ntsib ntawm ib qho chaw lossis kev sib tshuam vim tias lawv tau txhais li ntawd, yog tias ob kab yuav sib tshuam ces lawv yuav tsis nyob twj ywm kab
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