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Abel theorem
(redirected from Abel's theorem)

   Also found in: Wikipedia 0.01 sec.
Abel theorem [′ä·bəl ′thir·əm]
(mathematics)
A theorem stating that if a power series inzconverges forz=a, it converges absolutely for |z| < |a|.
A theorem stating that if a power series inzconverges tof(z) for |z| < 1 and toaforz= 1, then the limit off(z) aszapproaches 1 equalsa.
A theorem stating that if the three series withnth terman,bn, andcn=a0bn+a1bn-1+ ⋯ +anb0, respectively, converge, then the third series equals the product of the first two series.


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He continues with Abel's theorem, the gamma function, universal covering spaces, Cauchy's theorem for non-holomorphic functions and harmonic conjugates.
He then considers the work of Lagrange, Galois and Kronecker in concert, the process of computing Galois groups, solvable permutation groups, and the lemniscate, including the lemniscatic function, complex multiplication and Abel's theorem.
 
 
 
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