Table of Contents

- 1 How do you find the sum of a lower triangular matrix?
- 2 Is the product of two triangular matrices triangular?
- 3 What is lower triangular matrix in C?
- 4 Which condition is true for matrix A as lower triangular matrix?
- 5 How do you know if a matrix is lower triangular?
- 6 How do you find the sum of two upper triangular matrices?
- 7 Is C upper triangular or lower triangular?
- 8 How do you find the product of two matrices?

## How do you find the sum of a lower triangular matrix?

Logic to find sum of lower triangular matrix To find sum of lower triangular matrix, we need to find the sum of elements marked in the red triangular area. sum = sum + Aij (Where j < i).

## Is the product of two triangular matrices triangular?

Fact . : The product of two upper triangular matrices is upper triangular. The product of two lower triangular matrices is lower triangular.

**How do you find the sum of the upper triangular matrix?**

Algorithm

- Start.
- Declare an M*N 2D array.
- Initialize the array.
- If the number of rows and columns are not equal then it is not possible to display the sum of the elements of the upper triangle.
- If the number of rows is equal to the number of columns, then use two loops to iterate through the loops.

### What is lower triangular matrix in C?

Lower triangular matrix is a matrix which has elements below the principle diagonal including the principle diagonal elements and rest elements as zero.

### Which condition is true for matrix A as lower triangular matrix?

A=[aij]n×n is lower triangular iff all entries above the diagonal vanish, i.e., if aij=0 for i

**What is the determinant of a lower triangular matrix?**

The determinant of a lower triangular matrix (or an upper triangular matrix) is the product of the diagonal entries. In particular, the determinant of a diagonal matrix is the product of the diagonal entries.

#### How do you know if a matrix is lower triangular?

A matrix is lower triangular if all elements above the main diagonal are zero. Any number of the elements on the main diagonal can also be zero. is lower triangular.

#### How do you find the sum of two upper triangular matrices?

Let A be an upper triangular matrix. Then A i j is nonzero only if i ≤ j. Now let C = A B where A, B are upper triangular matrices of the same size. Then For given i, j this sum will only be nonzero if there is some k with i ≤ k ≤ j (otherwise at least one of A i k, B k j will vanish) which clearly requires i ≤ j. Therefore C is upper triangular.

**What is the difference between upper and lower triangular matrix?**

{ Notation: An upper triangular matrix is typically denoted with U and a lower triangular matrix is typically denoted with L. { Properties: 1. ˆ UT= L LT= U If you transpose an upper (lower) triangular matrix, you get a lower (upper) triangular matrix.

## Is C upper triangular or lower triangular?

Therefore C is upper triangular. Let us define two upper-triangular matrices A and B —by the upper-triangular matrix definition, a matrix M is an upper-triangular matrix if for every cell M i j where if i <= j, M i j! = 0 (all values below the diagonal are 0):

## How do you find the product of two matrices?

The product of two matrices relies on the products of one set of the entries with another set. If you compare the two, you’ll find that you have 0s just where you need them to produce another upper triangular matrix: