On the functional a(f(x+y)+f(x-y)-2f(x)-2f(y))+b(f(xy)-f(x)f(y)) = 0
C. R. Math. Rep. Acad. Sci. Canada Vol. 14 (4) 1992, pp. 121–124
August 1, 1992
C. Hammer
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On the functional a(f(x+y)+f(x-y)-2f(x)-2f(y))+b(f(xy)-f(x)f(y)) = 0
AMS Subject Classification:
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