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seen Feb 26 at 15:45

Apr
20
comment Understanding of method for NDSolve
LSODA is similar to the LSODE (the "Livermore Solver for Ordinary Differential/Algebraic equations" or some such). It is composed of stiff and non-stiff methods which switch when stiffness is sensed. The LSODE itself uses the Adams-Moulton method for non-stiff regions and then switches to a variable step, variable order Backward Difference Formula (Euler's method, I think). You can find more information via google. The report by Hindmarsh is also available for download as a pdf file.
Apr
17
comment What are these strange shapes in my Plot3D[]?
@YungHummmma could you share your NIntegrate code?
Apr
17
comment What are these strange shapes in my Plot3D[]?
@YungHummmma Yes, I would suspect so.
Apr
16
comment What are these strange shapes in my Plot3D[]?
Are you plotting the result of an NDSolve operation? If that is the case, you are trying to perhaps probe a time step of your equation beyond the limits imposed by numerical stability/stiffness for the solver type being used. Conjecture, at best.
Apr
11
comment Solving a nonlinear, second order d.e. in Mathematica
@Funzies what was the error your received with NDSolve? I am trying to solve this with a stiff solver such as LSODA and I've been receiving an NDSolve::berr error
Apr
11
comment Solving a nonlinear, second order d.e. in Mathematica
@LeonidShifrin NDSolve stiffness, story of my life! I found that using Method->"LSODA". I let the "MaxDifferenceOrder" "float". Given your hightened understanding of this problem, do you have any comment on my positive experience with "LSODA"?
Mar
5
awarded  Nice Question
Jan
27
awarded  Good Question
Jan
25
awarded  Yearling
Dec
16
awarded  Nice Answer
Nov
18
accepted How to plot the Euler's formula in 3D?
Oct
17
answered Trying to use NDSolve to solve Blasius equation
Oct
16
accepted Plotting velocity vectors for pressure driven pipe flow
Oct
14
asked Plotting velocity vectors for pressure driven pipe flow
Oct
6
awarded  Popular Question
Sep
23
revised How to plot the Euler's formula in 3D?
edited title
Sep
20
asked How to plot the Euler's formula in 3D?
Sep
9
accepted Modelling the effect of a structure on a “tsunami” (hyperbolic wave equation)
Sep
7
awarded  Popular Question
Sep
6
comment Modelling the effect of a structure on a “tsunami” (hyperbolic wave equation)
@Kuba Very interesting answer that was!