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Thanks Tim. I have checked now that the behavior of the "bug" depends on the machine the previous .nb is run on. -On my home machine/license (10.0.1 in Win 8.1, 64 bits) the "bug" does appear as in the notebook provided: the last outputs...
Dear Brendan, Please take into account that you are trying to solve a wrong equation: be aware of the n[t]^2 factor which should be n[t]. Just try this: DSolve[D[n[t], t] == r n[t] (1 - n[t]/k), n[t], t][[1]] with the answer of...
Thanks Udo, Your solution works very well for me and it is more elegant; it serves as well for other cases under study without specific changes. I tried ND before but I did not know that a package had to be loaded... Thanks again, and best...
Thanks Bruce, It is another good idea to take into account.