eilenberg-gania anuman

ellinberg-gania anuman beejganitiya topology mein ack daavaa haye. ise 1957 mein saimuel elenberg aur tudor ganiya dwara ack chhote, lekin prabhaavshaali pepper mein taiyar kiya gayaa thaa. yeh bataata haye kii yadi kissy samooh "jee" kaa samroopata ayam 2 haye, tou iska ack 2-ayami eilenberg-mcclane antariksh sootra haye. "aine" key liye 2 seey alag, samroopata ayam "aine" key ack samooh "jee" mein ack "aine"-ayami eilenberg-mcclane sthaan haye. yeh bhee gyaat haye kii samroopata ayam 2 key ack samooh mein ack 3-ayami eilenberg-mcclane sthaan hotaa haye.
1997 mein, laade hue bestavina aur noel brady ney ack samooh "jee" kaa nirmaan kiya taaki yaa tou "jee" eilenberg-gania anuman kaa ack vipareet udaaharan hoe, yaa whitehead anuman kaa ack vipareet udaaharan honah chaahiye; dusare shabdon mein, donon anuman sahee naheen hoe sakate hain.

