Read More
Date: 20-6-2021
1425
Date: 4-8-2021
1876
Date: 23-5-2021
1842
|
Let be a commutative ring and let be an R-module for . A chain complex of the form
is said to be acyclic if its th homology group is trivial for all values .
A straightforward result in homological algebra states that a chain complex with each free is acyclic if and only if there exists a chain contraction .
REFERENCES:
Ranicki, A. "Notes on Reidemeister Torsion." 1997. https://www.maths.ed.ac.uk/~aar/papers/torsion.pdf.
|
|
مخاطر عدم علاج ارتفاع ضغط الدم
|
|
|
|
|
اختراق جديد في علاج سرطان البروستات العدواني
|
|
|
|
|
مدرسة دار العلم.. صرح علميّ متميز في كربلاء لنشر علوم أهل البيت (عليهم السلام)
|
|
|