# What is an unsolvable math problem?

## What is an unsolvable math problem?

The Birch and Swinnerton-Dyer Conjecture is another of the six unsolved Millennium Prize Problems, and it’s the only other one we can remotely describe in plain English. This Conjecture involves the math topic known as Elliptic Curves. It was solved by Sir Andrew Wiles, using Elliptic Curves.

**What is the oldest unanswered math problem?**

1 Answer. The questions of existence of odd perfect numbers and are there infinitely many even perfect numbers go back to Euclid (although I’m sure Euclid did not explicitly state these problems). There are not many advanced mathematical texts before Euclid, so they have to be the oldest unsolved problem.

### In which movement did George Dantzig make his contribution of linear programming?

George Dantzig created the simplex algorithm for linear programming, perhaps the most important algorithm developed in the 20th century.

**Who is the father of linear programming?**

George B. Dantzig

#### Who invented LPP?

George Bernard Dantzig

**Why is it called linear programming?**

One of the areas of mathematics which has extensive use in combinatorial optimization is called linear programming (LP). It derives its name from the fact that the LP problem is an optimization problem in which the objective function and all the constraints are linear.

## Why is simplex method used?

Simplex method is an approach to solving linear programming models by hand using slack variables, tableaus, and pivot variables as a means to finding the optimal solution of an optimization problem. Simplex tableau is used to perform row operations on the linear programming model as well as for checking optimality.

**How many methods are there to solve LPP?**

A linear program can be solved by multiple methods. In this section, we are going to look at the Graphical method for solving a linear program. This method is used to solve a two-variable linear program. If you have only two decision variables, you should use the graphical method to find the optimal solution.

### How do you calculate LPP?

Answer: In order to calculate LPP, one must follow the following steps:Formulate the LP problem.Construct a graph and then plot the various constraint lines.Ascertain the valid side of all constraint lines.Identify the region of feasible solution.Plot the objective function.Finally, find out the optimum point.

**What is an optimal solution?**

An optimal solution is a feasible solution where the objective function reaches its maximum (or minimum) value – for example, the most profit or the least cost. A globally optimal solution is one where there are no other feasible solutions with better objective function values.

#### Which variables are fictitious and Cannot have any physical meaning?

In such cases basis of matrix cannot be obtained as an identity matrix in the starting simplex table, therefore we introduce a new type of variable called the artificial variable. These variables are fictitious and cannot have any physical meaning.

**Why artificial variable is used in LPP?**

In order to use the simplex method on problems with mixed constraints, we turn to a device called an artificial variable. This variable has no physical meaning in the original problem and is introduced solely for the purpose of obtaining a basic feasible solution so that we can apply the simplex method.

## What is the objective function for the problem?

Objective Function: The objective function in a mathematical optimization problem is the real-valued function whose value is to be either minimized or maximized over the set of feasible alternatives. In problem P above, the function f is the objective function.

**What is slack variable in optimization?**

In an optimization problem, a slack variable is a variable that is added to an inequality constraint to transform it into an equality. If a slack variable is negative at some point, the point is infeasible (not allowed), as it does not satisfy the constraint.

### How do you calculate slack variables?

7:33Suggested clip · 120 secondsSlack Variables – YouTubeYouTubeStart of suggested clipEnd of suggested clip

**What is slack variable in simplex method?**

A nonnegative variable that “takes up the slack” between the left-hand side of an inequality and the right-hand side is called a slack variable. The slack variable changes an inequality into an equation.

#### What is complementary slackness?

The second criterion is called Complementary Slackness. It says that if a dual variable is greater than zero (slack) then the corresponding primal constraint must be an equality (tight.) It also says that if the primal constraint is slack then the corresponding dual variable is tight (or zero.)

**How do you get a dual of primal?**

7:31Suggested clip · 110 secondsOperations Research 05B: Primal & Dual Problems – YouTubeYouTubeStart of suggested clipEnd of suggested clip

## What is duality theorem?

A theorem concerning the relationship between the solutions of primal and dual linear-programming problems. Another form of the theorem states: if both problems have feasible solutions, then both have finite optimal solutions, with the optimal values of their objective functions equal.