| 11. | Examples include states whose wavefunctions are Dirac delta functions or infinite plane waves.
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| 12. | This solution assumes that the delta function source is located at the origin.
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| 13. | Since, the Kronecker delta function, it follows that
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| 14. | It may be scattered at the delta function potential.
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| 15. | The superscript 2 indicates that the Dirac delta function is in two dimensions.
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| 16. | Where is the Kronecker delta function and the are the Gauss Chebyshev zeros of:
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| 17. | Another useful integral is the functional delta function:
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| 18. | The residence time distribution function is therefore a dirac delta function at \ tau.
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| 19. | Where \ delta is the Dirac delta function.
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| 20. | Finally, the delta function picks out t'= t _ r, and
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