math  2

math 1

Q1/(a) Let f be a map from linear space X into linear space Y, show that whether each one of the statements trure or flase or not. 41) If A convex set of X then f(A) is a convex set of w 20 (2) If M is an affine subset of a space X and tEM then M-this an affine set Let R be a field of real numbers and X-M2(R) be a space of 2x2 matrices over R that whether there is a hyperspace of X or not. I love 00

21: A: Let f be a function from a normed space X in to a normed space Y. show that of continuous iff for any sequence (x,) in X convergent to xo then the sequence (f(x)) convergent to f(x) in Y. B: Let X be a vector space of dimention n isomorphic to a vector space Y. write with prove the dimension of Y. 32 22: A: Let X be a horned space of finite dimension .show that any two normone X are V equivalent. B: Let M2x3 be a vector space of 2×3. matrices on a field ? write wittraver convex set and hyperplane of M2x3 17 that

arc. Consider the network of Figure 2, where the capacities of arcs are given in rectangles at each (i) Knowing that (W, W) with W = network. {s, a, b, c} is a minimal s- t cut suggest a maximal flow for this

Consider the problem of minimising the Euclidean distance from the point (-4,5) in the plane to the set of points (x, y) that have integer coordinates and satisfy the inequality: x2 y² + ≤1. 4 9 (a) Use an exhaustive search to solve this problem. (b) Use a local search method to solve this problem. First, define the search space and the neighbourhood. Then, attempt to find the minimum starting from the initial point (x, y) = (2,0). The neighbourhood of a point should contain at least two distinct points but must not encompass the entire feasible search space. Will your local search method find the global optimum?

Consider the relation ✓ on R² defined by u ≤ v u₁ + v₂+ 3u1 v² < u₂ + v³ + 3u²v₁ (u³ + v2 + 3u1v = u₂+ v³ + 3u²v₁ and u₂ < v2) u = v for any u, vЄR² with u = = (u1, u2), v = = (V1, V2). or 우우 or 1. Prove that the relation ✓ is translation invariant. Hint: Use the formula of (a + b)³ for a, b = R. 2. Is the relation ✓ scale invariant? Justify your answer. 3. Is the relation ✓ reflexive? Justify your answer. 4. Is the relation ✓ transitive? Justify your answer. 5. Is the relation ✓ antisymmetric? Justify your answer. 6. Is the relation ✓ total? Justify your answer. 7. Is the relation ✓ continuous at zero? Justify your answer.

Let X = [−1, 1] C R and consider the functions ₤1, f2 : X → R to be minimised, where f₁(x) = x + x² and f2(x) = x-x² for all x Є X. Solve the tradeoff model minøx µƒ₁(x)+ƒ2(x), for all values of µ ≥ 0. Show your working.

Consider the following linear programming problem: min x1 x2 3x3 − x4 s.t. — 2x1 − x2 − x4 ≤ −6 x1 x2 x3 + 2x4 <4 x1, x2, x3, x4 ≥ 0. (i) Write an equivalent formulation of this problem, to which the primal-dual algorithm can be applied. (ii) Write out the dual problem to the problem, which you formulated in (i). (iii) Solve the problem, which you formulated in (i), by the primal-dual algorithm using the dual feasible solution π = (0, -3). Write a full record of each iteration.