?subgrel page contains an interesting error example with a very short syllable c. It looks more interesting with other syllables,

subgrel({y=[a,b,averylongsyllable]}, 
    grelgroup({a,b}, {[a,a], [b,a]}));

Error, (in subgrel) generator [a, b, averylongsyllable] 
contains a syllable `averylongsyllable' that is not a generator, 
or the inverse of a generator, of the parent group

Alec

kernelopts(toolboxdir) crashes mserver both in Classic and Standard Maple 12 on Windows Vista (I didn't check the command line).

Alec

I just looked how differential forms are implemented and was quite surprized

with(DifferentialGeometry):
DGsetup([x,y,z],M):
a:=evalDG(dx &wedge dy+2*dy &wedge dz):
lprint(a);

_DG([["form", M, 2], [[[1, 2], 1], [[2, 3], 2]]])

It is an unevaluated function with nested lists as arguments.

Probably, not the worst possible choice since I can imagine few choices that would be worse - strings, for instance. But there are so many other choices that seem much better - antisymmetric Arrays, or tables, for instance. Why lists?

Alec

My calculus text says that a function cannot have an ordinary limit at an endpoint of its domain, but it can have a one-sided limit.  So, in the case of f(x) = sqrt(4 - x^2), the text says (a) that it has a left-hand limit at x = 2 and a right-hand limit at x = -2, but it does not have a left-hand limit at x = -2 or a right-hand limit at x = 2 and (b) that it does not have ordinary two-sided limits at either -2 or 2.

So there are six possibilities.  Maple gives limit = 0 for all six.  Why the discrepancy?

Alla

Multiplication by 0 gives 0 for differential forms, which is wrong. For example,

with(DifferentialGeometry):
DGsetup([x,y],M):
a:=dx &wedge dy: 
3*a;
                              3 dx ^ dy
0*a;
                                  0

It should be 0 dx^dy.

That reminds me of an old Matrix bug with M^0 being 1 instead of the identity Matrix for square Matrices.

Alec

I just noticed that usual parentheses work as square brackets for Matrices,

M:=Matrix(2,[a,b,c,d]);

                                 [a    b]
                            M := [      ]
                                 [c    d]
M(1,2)=M[1,2];
                                b = b

That leads to the following,

M(x,y);
Error, unsupported type of index, x

while that worked OK for matrices,

hi...!

  I m trying to slove one equation with maple but is giving warning.

"warning, solutions my have been lost"

this type of message is appering.. wat is the meaning of that? how to solve my equation?

My equation is interms of cosh, sinh, sin and cos..

Plz.. reply..

The following example arrived in my email inbox a few weeks ago. It spurred a short but lively thread of discussion amongst some Maple developers.

I thought that it was interesting enough to post here. I'll hold off on giving my own opinion right away, because I'm curious to read what other MaplePrimes members might write about it.

> q := (6*((1/3)*a-1/9))/(36*a-116+12*sqrt(12*a^3-3*a^2-54*a+93))^(1/3);
                                   6 (a/3 - 1/9...

The attached Maple worksheet gives an outline of the basics of differentiating trigonometric functions, commonly encountered problems, and how to use Maple to solve them.

The attached Maple worksheet gives an outline of the basics of differentiating exponential functions, commonly encountered problems, and how to use Maple to solve them.

Download Attached File

The attached Maple worksheet gives an outline of the basics of Concavity, Points of Inflection and the Second Derivative Test, commonly encountered problems, and how to use Maple to solve them.

The attached Maple worksheet gives an outline of the basics of increasing and decreasing functions, commonly encountered problems, and how to use Maple to solve them.

Download Attached File

The attached Maple worksheet gives an outline of the basics of implicit differentiation, commonly encountered problems, and how to use Maple to solve them.

The attached Maple worksheet gives an outline of the basics of higher order derivatives, commonly encountered problems, and how to use Maple to solve them.

The attached Maple worksheet gives an outline of the basics of differentiation, commonly encountered problems, and how to use Maple to solve them.