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Joacim Andersson: I decided it would be fun to create a Project which filled in Magic Squares & provided tools making it convenient for a User to generate various special Magic Squares.

It seemed...

I have an application with as many as 625 Textboxes in a runtime generated control array.

I add textboxes one at a time in a subroutine.

The application ran with no problems until the...

Due to the price ($0.00), I have been using Visual Studio Express 2010.

Microsoft has announced a price reduction in anticipation of the release of new versions.

Visual Basic Professional can...

Did you get my reply relating to the Newton method?

Sorry I did not notice the message from you sooner.

Boops Boops: Thanx much for the very useful information in your posts.

Will make use of it in my current & future projects. I copied from your posts & from the Linked-to Sites indicated in your...

Boops Boops: Thanx for your advice. I have copied the code you indicated, scanned it briefly, & will study it later.

I must update my signature. I amnow running 64Bit Windows 7 & using VB.net 2010...

VB 6.0 had a Set Pixel function, which is not available in VB.net. Help suggested using a draw ellipse function with parameters specifying a circle one pixel in diameter.

The above is painfully...

The install worked, but showed some complaining messages.

One VB6.0 application ran okay. Perhaps the only problem will be attempting to produce code to be run under Win7 outside the IDE.

I...

I am right now installing VB6.0 on a 32Bit Windows 7 system.

The install process complained about compatibility issues, & I am wondering what might go wrong.

Has anyone tried to install VB6.0...

Thanx for all the information.

I have yet to be disappointed at this site.

I wrote about ten applications using VB 6.0 (SP5) under Windows 98SE. I have the Enterprise Edition, but have not done much with either Visual C++ or Visual FoxPro.

Can Visual Basic 6.0 create...

Several years ago there was a thread at this forum whihc descibed matrix inversion, determinant evaluation, and solution of simultaneous linear equations.

A search might find it.

The first answer seems incorrect to me. Check the following

(1 + bx)n = 1n + b*1n-1*x + (n-1)*b*1n-2*x2

Compare the above with 1 + 7.5x + 22.5x2 + additional terms

From the above, b = 7.5...

Fiddle with the two equations until you have t = F(x) & t= G(y).

Then F(x) = G(y), eliminating t. Fiddle with this to simplify it. They usually want y = H(x).

I could do it all for you, but...

Rassis: Your last post seems right on. I tried my approximation using a weighted average of probabilities for 365 & 366 day years. Probability was same for 3 digits. I suspect that the weighted...

You folks seem to be misunderstanding the nature of this anomaly.

There is no problem finding a very precise approximation to the roots of these polynomials. I know that my VB program gives about...

A while ago I wrote a VB program to find the roots of polynomials. It easily found all the roots for polynomials of order 20-40, and I think might handle order 100 and beyond.

Recently I...

The leap year algorithm is as follows (order of tests is critical).If year is evenly divisible by 400, it is a leap year.

If year is evenly divisible by 100, it is not a leap year.

If year is...

What is the shape of a die with 100 sides if it is required that each side have the same probability of being faceup?

Are you allowed to use a calculator which only does add, subtract, multipy, & divide? Id est: A calculator without a square root function.

There are a few specialized problems for which logic provides a valid answer for zero divisors.

Example: Calculation of angles using the Atn function. You want to know the angle given (X, Y),...

Marco is essentially correct, but calculaing the exact probabilities seems more complex. His formula ignores consideration of leap years.

Perhaps use his formulae twice, once for years with 365...

I am considering learning to use Visual C++ after learning to use Visual Basic.net MY Visual studio includes C++ 6.0, but I have only used VB 6.0

If there is going to be a similar upgrade from C++...

Kedaman: Right you are!!

Why not 48 + 4 = 52?

There are 16 sets of cells parallel to each of the xyz-axes: 3 * 16 = 48
There are 4 diagonals: 48 + 4 = 52

Kedaman: Sorry if I mislead anybody. It has been a long time since I read anything about Turing machines. I only remembered that they had very few instructions, which made it easy to analyze their...

I think a Turing machine can only do a few operations (less than 10-20). Try a Web search to find out what operations are allowed. It should be a lot simpler to understand than the posted description...

An interesting ethical issue has been raised here. Must you take action to save somebody?

It seems rational to me that a person is required to do no evil, but is not required to do good.

I...

The Newton iterative method should work. To find a zero of F(x), iterate the following.

NextX = X - F(X) / F'(X)

Guess at an initail value, computer NextX. then use NextX to compute another...

NotLKH: Martin Gardner is one of my favorite people and a man to be respected. His columns in Scientific American were delightful. I read almost all of them.

Congratulations!! It is to your credit...

NotLKH: For order 3, there is only one magic square if you use the integers from 1 to 9. It can be reflected & rotated, but that does not really change its structure. In a sense, using an arithmetic...

Work with the angles. Consider a right triangle with one leg parallel to the direction of motion of the car. The other leg is perpendicular to the motion of the car and pointing directly at object....

NotLKH: Continuous range seems more essential. Otherwise, I think you are dealing with a different game.

Starting with some value other than one or using an arithmetic progression (say 1, 3, 5, 7,...

Kedaman: Constructing Magic Squares is interesting to some people. When very young, I was both fascinated and challenged by them. It might have been a child who coined the term Magic.

The...

The standard definition uses the integers from 1 to n2.

It is interesting to use zero to (n2 - 1) and radix n notation.

For n > 3, you can create squares with various special properties. The...

TheManWhoCan: You remembered the proof incorrectly. Your proof only proves that the sum is less than an infinite sum of ones. None of your groups is greater than one

The grouping you need is the...

Search for “Pythagorean Theorem,” which proves that x2 + y2 = z2 if (x, y) are the short sides of a right triangle and z is the hypotenuse. I am pretty sure that the reverse theorem has also been...

For amusement and due to nostalgia, I run DOS & windows 3.11 on a Multi-OS system. They are disappointing due to the lack of video drivers compatible with modern PCI/AGP graphics cards. I intend to...

Where are you?

In the early 1940's Cornelius “Dutch” Warmerdam raised the pole vault record from 14 feet 11 inches to 15 feet 7.75 inches (4.77 meters). He vaulted 15 feet 8.5 inches (4.79) indoors, but indoor...