The government is now demanding prediction and accountability from the things it funds. Reasonable enough. A prime example of expert prescription/prediction and government funding was the Bahcall report on what's hot and what's not in astronomy. The government followed his recommendations and heavily funded; results were in fact achieved. But math has a bad track record of prediction.
The worst was the COSRIMS report of 1969, which predicted a terrible shortage of math Ph.D.'s – so bad in fact, that they recommended a new degree, "Doctor of Arts" (basically an ABD). But by 1971, math Ph.D.'s were driving cabs.
[A personal note:
In 1971, I began in the math Ph.D. program at Berkeley. But I was penniless, and there was no fellowship to be had. So I switched to linguistics, where a fellowship in Arabic was available.
In retrospect, this was probably a good thing. For I don't really much enjoy driving ...]
In 1971, I began in the math Ph.D. program at Berkeley. But I was penniless, and there was no fellowship to be had. So I switched to linguistics, where a fellowship in Arabic was available.
In retrospect, this was probably a good thing. For I don't really much enjoy driving ...]
Examples of fields once out of favor, which found renewed life:
* Invariant theory
The detailed calculations of Cayley were surpassed/subsumed by Hilbert (cf. "Hilbert's theorem" page in Lang's Algebra); Weyl suggested that this was all that need be said.
* Knot theory
When Atiyah dominated topology, he dissed it
* Pathological spaces
Milnor disliked these infinite-dimensional monstrosities, but one was used in Mike Freedman's proof of the 4-dim Poincaré conjecture
* Enumerative geometry
* Fermat's theorem
Hardy predicted that Number Theory would long have no applications. Yet now it is so crucial for codes, there is a rumor that the DoD/NSA has made a breakthrough in factoring – the only case in which the cutting edge is not in the literature. For one thing, they suddenly stopped funding factoring research.
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