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D.12.2.3 disc
Procedure from library atkins.lib (see atkins_lib).
- Usage:
- disc(N,k);
- Return:
- list L of negative discriminants D, sorted in decreasing order
- Assume:
- D<0, D kongruent 0 or 1 modulo 4 and |D|<4N
- Note:
- D=b^2-4*a, where 0<=b<=k and intPart((b^2)/4)+1<=a<=k for each b
Example:
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