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There will not be a lot of details in this section, nor will we be working large numbers of examples. The first special matrix is the square matrix.

In other words, it has the same number of rows as columns. In a square matrix the diagonal that starts in the upper left and ends in the lower right is often called the main diagonal.

The next two special matrices that we want to look at are the zero matrix and the identity matrix. Here are the general zero and identity matrices.

These are matrices that consist of a single column or a single row. Arithmetic We next need to take a look at arithmetic involving matrices. If it is true, then we can perform the following multiplication. Here are a couple of the entries computed all the way out.

Determinant The next topic that we need to take a look at is the determinant of a matrix. The determinant is actually a function that takes a square matrix and converts it into a number.

The actual formula for the function is somewhat complex and definitely beyond the scope of this review. The main method for computing determinants of any square matrix is called the method of cofactors. We can give simple formulas for each of these cases.

There is an easier way to get the same result. A quicker way of getting the same result is to do the following. First write down the matrix and tack a copy of the first two columns onto the end as follows.

What we do is multiply the entries on each diagonal up and the if the diagonal runs from left to right we add them up and if the diagonal runs from right to left we subtract them. Here is the work for this matrix. Matrix Inverse Next, we need to take a look at the inverse of a matrix.

Example 4 Find the inverse of the following matrix, if it exists.

In other words, we want a 1 on the diagonal that starts at the upper left corner and zeroes in all the other entries in the first three columns. If you think about it, this process is very similar to the process we used in the last section to solve systems, it just goes a little farther.

Here is the work for this problem. Example 5 Find the inverse of the following matrix, provided it exists. However, there is no way to get a 1 in the second entry of the second column that will keep a 0 in the second entry in the first column. We will leave off this discussion of inverses with the following fact.

Systems of Equations Revisited We need to do a quick revisit of systems of equations. The solving process is identical. There will be no solutions.Here you will get C and C++ program to find inverse of a matrix. We can obtain matrix inverse by following method. First calculate deteminant of matrix.

Seeing imaginary numbers as rotations was one of my favorite aha moments. i, the square root of -1, is a number in a different dimension! Once that clicks, we can use multiplication to "combine" rotations of two complex numbers. This C program performs matrix multiplication.

In matrix multiplication, we take two matrices of order m*n and p*q respectively to find a resultant matrix of the order m*q where n is equal to p. Time Complexity of this algorithm is O(n 3). Here is the source code of the C program to perform matrix multiplication.

The C program is successfully compiled and run on a Linux system. Matrix-chain Multiplication. The goal of the matrix-chain multiplication problem is to find the most efficient way to multiply given $n$ matrices $M_1, M_2, M_3,,M_n$.

Multiplication of matrices is a very popular tutorial generally included in Arrays of C Programming. In this post, we’re going to discuss an algorithm for Matrix multiplication along with its flowchart, that can be used to write programming code for matrix multiplication in any high level language.

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C program to multiply two matrices