## 607 Reputation

19 years, 287 days

## Next step...

@Markiyan Hirnyk  yes, the next step. However, maybe someone who is expert in elliptic functions and Maple could derive it.

## Solution of the problem...

Meanwhile I found a "solution".

Instead of  u1'(z) or  D(u1)(z)  the usage of

d
---    u1(z)
dz

works well.

## it's ok but ......

@Kitonum

In fact, my original problem is the following:

(Maple)

(Maple)

(Maple)

eq2

(Maple)

(Maple)

So u_2 is a function, but u_2 is unchanged in  D(u_2).
I need more help.
Thanks.

## good solutions...

To my problem evalc is better fitted.

## Initial condition...

@ecterrab

Very nice!  Only two questions: Does the Maplesoft DifferentialEquation updates can handle the initial conditions given in Vector  form?
Does it work with Maple 15?

## Nothing changed since 2010?...

Those Alejandro Jakubi mention are from 2010.

## Good question...

• What a surprise! One of my student asked the same. (He showed me corresponding Wolfram Math. commands and interested about the corresponding commands in Maple.)

## de2diffop...

Great! What I wanted. I prefer your first solution. Thanks.

## de2diffop...

Great! What I wanted. I prefer your first solution. Thanks.

## The meaning of error...

Thanks. I see. Luckily the newer versions can handle this recursive problem.

## The meaning of error...

Thanks. I see. Luckily the newer versions can handle this recursive problem.

## Maybe a version problem...

@Markiyan Hirnyk Taking into account of the answer of acer it maybe a version problem.
Hopefully newer versions handle this problem properly.

## Suppressing the interpretation of space ...

I'm not an expert, but I think modifying temporarily Typesetting, interface, etc. somehow by Maple commands (demanding explicit use of multiplication symbol) could solve this problem.  I would like to
use it in a procedure.

## Suppressing the interpretation of space ...

I'm not an expert, but I think modifying temporarily Typesetting, interface, etc. somehow by Maple commands (demanding explicit use of multiplication symbol) could solve this problem.  I would like to
use it in a procedure.

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