Hi, how we can get the min of two real-valued piecewise continuous functions as another piecewise function. To me Maple responded with min(fn1,fn2), which I dont need. Plz hep.

Ruined your life?  Well, almost.  But now that you’re intrigued with my wild claim, let me explain.

The science of mathematics has a very long heritage.  The language of mathematics, as we recognize it today, is a bit younger – widely credited to François Viète, who introduced the first systematic algebraic notation in the last half of the 16^th Century.

Along the way, over the course of many centuries, the power of mathematics increased steadily, through the contributions of many great men. 

There are two new posts over on the Maplesoft Blog:

Postcards from the road: Part 1 -- On rocket science

By Tom Lee

One of the greatest pleasures of my job is meeting users and learning first hand of their achievements (hopefully with our products). Last week was a particularly eventful week and a distinct highlight was a visit our friends at the Canadian Space Agency (CSA) in Montréal.

One of the greatest pleasures of my job is meeting users and learning first hand of their achievements (hopefully with our products). Last week was a particularly eventful week and a distinct highlight was a visit our friends at the Canadian Space Agency (CSA) in Montréal.

Dear all, I need some help with this program I have. I ran this recursive system only to find that it stopped working at 1.89Gb. Anyone out there knows the problem or maybe there's a better way of writing this program?

Following worse-than-good advice can lead to loss of time and to greater misunderstanding. I have noticed, over the past year, a growing proportion of suboptimal responses and advice on the mapleprimes forums.

There are still many fine responses, but slightly incorrect or inefficient (and sometimes outright wrong) responses seem to have been growing as a proportion of the whole. This is probably natural, as the mapleprimes site grows. But some of the ensuing bad effects of it could be avoided.

Hi, I want to carry out set-theoretic operations on real-line intervals.  For example

> [2,5] intersect [3,7];
 

Is there any package available for this and interval arithmetics?

Thanks.

In ?property > Description it is stated:

A property can be:
...
(2) most types (this includes constant values, for example, 0)

E.g. I can do:

assume(x,1):
about(x);

Originally x, renamed x~:
  is assumed to be: 1

is(x,1);
                                    true

But, I am missing a useful example for such a property.

Besides, I find these properties confusing as 0 and 1 have parent properties entries in the property lattice, but not 2:

This behaviour of 'assume' puzzles me ... 
and it needed some time to locate it
 
  restart; interface(version);

  Classic Worksheet Interface, Maple 12.00, Windows, Apr 10 2008 Build ID 347164

  assume(a::real); 
    #a:='a'; # activating removes the problem
  f0:=x+a; 
    #a:='a'; # that would not help - since is in use?
  assume(0<a);
  f:=collect(f0,x);

     ...

It would be nice to have a link to Recent posts off the main mapleprimes page that guests see (ie. even when not logged in).

It'd be a pity if the only reason that this is not available is just so that page can show how many new (unread by logged-in user) posts there are in each thread.

acer

Hi, I have a table of tables like the following one.

fss:= [{a, b, c}, table([e4 = table([a = .4, b = .7, c = 1]), e1 = table([a = .2, b = 0, c = .1]), e2 = table([a = .1, b = 1, c = .4])]), {e1, e2, e3, e4}];
 

Now I want to compute fss[2][e4][b]/2.0 but Maple does not recognize table entry as a number. What I should do? What is the reason for this behaviour?

I'm running into a problem with Maple where DotProduct seems to destroy the functions it assigns.

I ran a simple case, and it seemed to work just fine: (dotproductproblem.mw)

However, my code seems to follow the exact same logic but doesn't want to work? Code is a simple check that a bessel function solution of current density follows Maxwell's Equations. (Cylinder_AC_test2.mw)

Maple 11.

Has anyone encountered this problem before? Or know what's wrong in the code I'm running? (code attached)

Dear ODE enthusiasts and Maple developers,

I'm trying to do some differential geomery calculations and they are becoming outrageously large.  I'd like to use Maple's differential geometry package (tensor package), but it seems incapable of performing the calculations in an arbitrary number of dimensionis (i.e. with a fixed but arbitrary number of dimensions).  Does anyone know of a good package or tool to use for such work?

Hello,

Whenever I use the compiler in Maple 12 ...I get an error message that it cannot create a directory becuase of write permissions.  I have opened up all permissions that I can think of.  Am I missing something ??

Thanks