Abstract

Physicists and mathematicians in the early twentieth century had established a research program on various random fluctuations. Historical reviews have portrayed this development as a linear progress toward a unified conceptual framework. In this paper, I argue that two approaches were at work. One operated in the “time domain,” as it aimed to formulate the diffusion-type equation for the probability density function and its solutions. The other operated in the “frequency domain,” as it focused on the spectral analysis of the fluctuation. The time-domain analysis was marshaled by statistical physicists, while the frequency-domain analysis was promoted by engineering researchers.

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Additional Information

ISSN
1530-9274
Print ISSN
1063-6145
Pages
pp. 45-72
Launched on MUSE
2015-12-30
Open Access
No
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