Alec Mihailovs

Dr. Aleksandrs Mihailovs

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20 years, 342 days
Mihailovs, Inc.
Owner, President, and CEO
Tyngsboro, Massachusetts, United States

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I received my Ph.D. from the University of Pennsylvania in 1998 and I have been teaching since then at SUNY Oneonta for 1 year, at Shepherd University for 5 years, at Tennessee Tech for 2 years, at Lane College for 1 year, and this year I taught at the University of Massachusetts Lowell. My research interests include Representation Theory and Combinatorics.

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These are replies submitted by Alec Mihailovs

There is also a list in Wikipedia.

Searching Google for a list of unisex names reveals a lot of other pages as well.

In particular, the list of top unisex names in 2005:


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Jordan
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Alexis
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Angel
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Riley
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Peyton
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Taylor
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Jayden
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Alec

Edgardo,

It was few years ago, soon after Heun function were introduced in Maple. At that time, I noticed that a few differential equations giving answer in terms of other special functions earlier, started to give answer in terms of Heun functions, and there seem to be no an easy way to convert them back. I made few posts on beta site about that, and if I recall correctly, you provided a few rather angry, in your style, replies. They, probably, could be found in the beta archives. I don't have copies of them, so I can't check whether those examples can be converted to special functions in the current Maple version, or not.

Alec

Edgardo,

It was few years ago, soon after Heun function were introduced in Maple. At that time, I noticed that a few differential equations giving answer in terms of other special functions earlier, started to give answer in terms of Heun functions, and there seem to be no an easy way to convert them back. I made few posts on beta site about that, and if I recall correctly, you provided a few rather angry, in your style, replies. They, probably, could be found in the beta archives. I don't have copies of them, so I can't check whether those examples can be converted to special functions in the current Maple version, or not.

Alec

Also, since integers are also functions in Maple, that can be written as

f:=<($1..5)>:

f[3](x);
                                  3

Alec

Also, since integers are also functions in Maple, that can be written as

f:=<($1..5)>:

f[3](x);
                                  3

Alec

However, I've just tested that, and it doesn't work as it is supposed to - it assigns everything to 6 (actually, to i, which is 6 after the loop):

f_1(3);
                                  6
f_2(1);
                                  6

One of (many) possible ways of doing it right is

for i from 1 to 5 do 
    cat(`f_`,i) := parse(cat("x ->", i)) end do;
                            f_1 := x -> 1


                            f_2 := x -> 2


                            f_3 := x -> 3


                            f_4 := x -> 4


                            f_5 := x -> 5

Alec

However, I've just tested that, and it doesn't work as it is supposed to - it assigns everything to 6 (actually, to i, which is 6 after the loop):

f_1(3);
                                  6
f_2(1);
                                  6

One of (many) possible ways of doing it right is

for i from 1 to 5 do 
    cat(`f_`,i) := parse(cat("x ->", i)) end do;
                            f_1 := x -> 1


                            f_2 := x -> 2


                            f_3 := x -> 3


                            f_4 := x -> 4


                            f_5 := x -> 5

Alec

Another way of saying it is to say that a linear model is a linear combination of some functions of independent variables (sometimes called "test" functions.)

It looks like a*f(x,y)+b*g(x,y)+c*h(x,y)+k(x,y) for a model with 3 parameters, 2 independent variables, and 4 test functions, one of which can not be changed.

Sometimes non-linear models can be rewritten in another form as linear. For example, model a*cos(x-b) with independent variable x and 2 parameters a and b is non-linear, but it can be written in form A*cos(x)+B*sin(x), which is linear in parameters A and B.

Similarly, a non-linear model in jpmay example above can be written as a linear model x^2+A*x+B.

That is not always possible though.

Alec

There were no vandalism against Maple wiki from the blocked Maplesoft IP address, and there couldn't be, because it was blocked.

There is an evidence of the vandalism from that IP address against the wikipedia. Which created an evident threat to the Maple wiki, especially keeping in mind that it was my editing in the wikipedia which was wiped out from that IP address, and the history of deleting (censorhip, using your term) my posts on this and other Maplesoft owned sites.

Alec

Edit: I also don't agree with calling it my wiki. While I host it on my webspace (because nobody else wanted to do that), and do system administration (again because nobody else wanted, or qualified, to do that), it is a wiki - a piece of the web that everybody can edit. I don't own it. I own only the copyright to the materials that I personally posted there.

Currently, 4 people posted their materials there - Robert Israel, Alejandro Jakubi, Fred Lunnon, and me - in this sense it may be called Robert Israel's, Alejandro Jakubi's, Fred Lunnon's, and mine wiki. But when somebody else will post his/her materials, it will be his/her part of the wiki, too.

Alec

There were no vandalism against Maple wiki from the blocked Maplesoft IP address, and there couldn't be, because it was blocked.

There is an evidence of the vandalism from that IP address against the wikipedia. Which created an evident threat to the Maple wiki, especially keeping in mind that it was my editing in the wikipedia which was wiped out from that IP address, and the history of deleting (censorhip, using your term) my posts on this and other Maplesoft owned sites.

Alec

Edit: I also don't agree with calling it my wiki. While I host it on my webspace (because nobody else wanted to do that), and do system administration (again because nobody else wanted, or qualified, to do that), it is a wiki - a piece of the web that everybody can edit. I don't own it. I own only the copyright to the materials that I personally posted there.

Currently, 4 people posted their materials there - Robert Israel, Alejandro Jakubi, Fred Lunnon, and me - in this sense it may be called Robert Israel's, Alejandro Jakubi's, Fred Lunnon's, and mine wiki. But when somebody else will post his/her materials, it will be his/her part of the wiki, too.

Alec

Great news: Robert Israel's Maple Advisor Database is now the central part of Maple Wiki,
 
 
Alec

Plot, for example,

plot(4*cos(x)-0.9*x);

Alec

Plot, for example,

plot(4*cos(x)-0.9*x);

Alec

Linearity in this context means that the derivative over a parameter doesn't depend on this or other parameters. Non-linear models also can be fit in Maple. In particular, using Statistics:-NonlinearFit. The help page for it has an example of a non-linear model.

Alec

Acer,

That, certainly, would be a great imrovement.

I use mint a lot as a standalone program, but the possibility of using it from Maple as maplemint seems extremely attractive.

Alec

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