Math Problem Statement
对于图中公式,i为虚数单位,n为整数,范围为负无穷到正无穷,对所有n取值求和该式,并将结果用狄拉克δ函数表示,且保证q只出现在δ函数的自变量中,给出详细的推导步骤
Solution
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Math Problem Analysis
Mathematical Concepts
Complex Analysis
Fourier Series
Dirac Delta Function
Formulas
C(q) = \frac{1}{2\pi} \sum_n e^{iqn - i(-1)^n \frac{\pi}{4}}
\sum_{n=-\infty}^{\infty} e^{iqn} = 2\pi \delta(q)
\sum_{k=-\infty}^{\infty} e^{i2kq} = \pi \delta\left( \frac{q}{2} \right)
Theorems
Fourier Series Expansion
Dirac Delta Function
Suitable Grade Level
Undergraduate or Graduate Level
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