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Question: Does maple need to wait a few seconds before returning the correct result in some special cases?

Question:Does maple need to wait a few seconds before returning the correct result in some special cases?

Wang Gaoteng 173 Maple 14
April 10 2011
0



 

Download 321.mw

There is a problem which I feeling very puzzling, it is not the codes, but about when running the codes. It seems that if I running the codes immediately (or use "run all the worksheet" ), an error returned unexpectedly, but if I wait a few seconds before rerunning the code which just causes the error, a correct result returned. I feel very puzzling, so I tried many ways, including: restart worksheet; reopen worksheet; restart maple; but the problem seem inveterately. I upload the worksheet (maple 14).

Can you give me some advices?

Best regards.

 

PS: A more serious case: if running (or restart ) the worksheet many times, then whether wait a few seconds (even a few minutes) or not, the error always returned!

 (1)

(2)

Error, (in dsolve) found the following equations not depending on the unknowns of the input system: {y(0) = 0}

  

If you wait a few seconds before rerunning the code which causes the error, then a correct result returned.

The codes are excerpted from a maplesoft blog "Yet More Gems from the Little Red Book of Maple Magic": Gem 11.

If you use the following codes, then the correct result returned immediately. So all the codes above are right, but the error "Error, (in dsolve) found the following equations not depending on the unknowns of the input system: {y(0) = 0}" above is very puzzling.

 

(3)


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