2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Rau qhov kev xav niaj hnub no ntawm kev ua haujlwm, nws "nco" nws cov codomain, thiab peb xav kom lub npe ntawm nws cov inverse ua tag nrho cov codomain, yog li ib qho kev txhaj tshuaj tsuas yog invertible yog tias nws tseem yog bijective.
Puas txhaj tshuaj imply inverse?
Yog tias koj txoj haujlwm f: X → Y yog txhaj tshuaj tab sis tsis tas yuav tsum tau surjective, koj tuaj yeem hais tias nws muaj inverse muaj nuj nqi txhais ntawm daim duab f(X), tab sis tsis nyob rau Tag nrho cov Y. Los ntawm kev muab cov txiaj ntsig tsis txaus ntseeg ntawm Y∖f(X), koj tau txais sab laug inverse rau koj txoj haujlwm.
Koj paub li cas yog matrix txhaj?
Cia A ua matrix thiab cia Ared yog kab txo daim ntawv A. Yog Ared muaj tus thawj 1 hauv txhua kab, ces A yog txhaj. Yog Ared muaj ib kem uas tsis muaj tus thawj 1 hauv nws, ces A tsis txhaj.
Puas yog square matrix txhaj?
Note that a square matrix A is injective (los yog surjective) iff nws yog ob qho tib si txhaj tshuaj thiab surjective, i.e., iff nws yog bijective. Bijective matrices tseem hu ua invertible matrices, vim hais tias lawv yog tus yam ntxwv los ntawm lub neej ntawm ib tug cim square matrix B (tus inverse ntawm A, denoted los ntawm A−1) xws li AB=BA=I.
YPuas txhaj yog thiab tsuas yog nws muaj sab laug sab laug?
Claim: f yog txhaj tshuaj yog tias nws muaj qhov thim rov qab. Pov thawj: Peb yuav tsum (⇒) ua pov thawj tias yog f yog txhaj tshuaj ces nws muaj sab laug inverse, thiab (⇐) tias yog f muaj sab laug inverse, ces nws yogtxhaj tshuaj. (⇒) Piv txwv tias f yog txhaj. Peb xav tsim ib txoj haujlwm g: B→A xws li g ∘ f=idA.
Pom zoo:
Puas yog humira txhaj tshuaj?
Kev nkag siab HUMIRA HUMIRA yog tshuaj kho mob uas tau txhaj tshuaj hauv qab daim tawv nqaij. Koj tuaj yeem tswj hwm koj tus kheej hauv kev nplij siab ntawm koj tus kheej hauv tsev, los ntawm tus cwj mem los yog lub koob txhaj tshuaj ua ntej.
Cov tshuaj tiv thaiv dab tsi rau kev txhaj tshuaj tiv thaiv thib ob?
Cov tshuaj tiv thaiv COVID-19 thib ob yog dab tsi? Cov kev mob tshwm sim feem ntau tom qab koob thib ob yog qhov mob ntawm qhov chaw txhaj tshuaj (92.1% tshaj tawm tias nws kav ntev dua 2 teev); qaug zog (66.4%); mob lub cev lossis leeg nqaij (64.
Puas muaj cov dej tsis huv rau kev txhaj tshuaj rau kev siv tshuaj?
dej tsis huv rau nqus tau. Cov dej no feem ntau yog npaj rau siv nrog inhalators thiab npaj cov tshuaj inhalation. Nws nqa cov ntsiab lus nruj me ntsis rau cov kab mob endotoxins ntau dua li tsis muaj WFI thiab, yog li ntawd, tsis haum rau kev siv parenteral.
Yuav ua li cas txhaj tshuaj tiv thaiv kab mob hauv qab no niaj hnub muab tshuaj intramuscularly?
Nyob, cov tshuaj tiv thaiv tsis zoo (piv txwv li, MMR, varicella, daj kub taub hau) thiab qee yam tshuaj tiv thaiv tsis ua haujlwm (xws li meningococcal polysaccharide) tau pom zoo los ntawm cov tuam txhab ua haujlwm los ntawm subcutaneous. txhaj tshuaj.
Puas yuav ua rau kom nqus tau cov tshuaj txhaj tshuaj intramuscularly?
Kev nqus sai sai rau kev txhaj tshuaj intramuscular piv rau kev txhaj tshuaj subcutaneous. Qhov no yog vim cov leeg nqaij muaj ntshav ntau dua li thaj chaw hauv qab ntawm daim tawv nqaij. Cov nqaij mos kuj tseem tuaj yeem tuav cov tshuaj ntau dua li cov ntaub so ntswg subcutaneous.
