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Feb
9
awarded  Famous Question
Oct
13
awarded  Popular Question
Oct
2
comment DSolve gives an empty solution set to a solvable ODE
@user58955 well but it could warn you that the result may only be global, it even fails to check it correctly (which is easy because calculating derivatives is easy)
Oct
2
awarded  Quorum
Oct
2
comment DSolve gives an empty solution set to a solvable ODE
I can read it now, but the solutions aren't totally correct. And could you tell why it gives these result, and why my version doesn't give them?
Oct
2
comment DSolve gives an empty solution set to a solvable ODE
@chuy I tried it and now I am even more confused, it gives the same wrong answer as maple, and another one which does have a negative derivative which is totally impossible
Oct
2
comment DSolve gives an empty solution set to a solvable ODE
I can't read what is in the box, the maple answer is only a local solution and is wrong for $x\in(-\infty,0)$. Indeed i am more interessted what makes this behaviour than the actual result of the ode
Oct
2
comment DSolve gives an empty solution set to a solvable ODE
@belisarius the ode is autonomous so the solutions are always monotone, here it is monotone increasing but that doesn't help for $t\to -\infty$
Oct
2
asked DSolve gives an empty solution set to a solvable ODE
Jul
7
accepted Are variables always assumed to be real in Jordan Decomposition?
May
4
comment Are variables always assumed to be real in Jordan Decomposition?
@DanielLichtblau yeah but there is no tag like "mathematica behaves different to what i expect" :)
May
4
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May
3
awarded  Citizen Patrol
May
3
awarded  Commentator
May
3
comment Are variables always assumed to be real in Jordan Decomposition?
But the form is unique up to Permutation of the blocks, here one time we have a diagonal Matrix and one time, we don't have, that is impossible
May
3
asked Are variables always assumed to be real in Jordan Decomposition?
Feb
14
awarded  Yearling
Feb
12
awarded  Notable Question
Sep
18
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May
3
asked What does the Error Message in DSolve really mean?