The Mathematics of the Casimir Effect - School of Mathematical ...
The Mathematics of the Casimir Effect - School of Mathematical ...
The Mathematics of the Casimir Effect - School of Mathematical ...
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<strong>The</strong> <strong>Casimir</strong> <strong>Effect</strong><br />
Making Sense <strong>of</strong> Infinity - Infinity<br />
Conclusion<br />
Summing Divergent Series<br />
<strong>The</strong> Ma<strong>the</strong>matical Setting<br />
Divergent Series<br />
Euler-Maclaurin Formula<br />
Abel-Plana Formula<br />
Some divergent series can be summed in a sensible way . . .<br />
S =<br />
∞∑<br />
(−1) n = 1 − 1 + 1 − 1 + 1 − 1 + . . .<br />
n=0<br />
Cesaro summation: let S N = P N<br />
n=0 (−1)n and compute<br />
Abel summation:<br />
1<br />
S = lim<br />
N→∞ N + 1<br />
S = lim<br />
x→1 −<br />
∞<br />
X<br />
n=0<br />
NX<br />
S N = 1 2<br />
n=0<br />
(−1) n x n = 1 2<br />
Borel summation, Euler summation, . . . : again S = 1 2<br />
∞∑<br />
. . . but some (such as n) cannot<br />
n=0<br />
Thomas Prellberg<br />
<strong>The</strong> <strong>Ma<strong>the</strong>matics</strong> <strong>of</strong> <strong>the</strong> <strong>Casimir</strong> <strong>Effect</strong>