Introduction to Algorithms
3rd Edition
ISBN: 9780262033848
Author: Thomas H. Cormen, Ronald L. Rivest, Charles E. Leiserson, Clifford Stein
Publisher: MIT Press
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Chapter 3.2, Problem 1E
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To show that the functions
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Show that if f(x) and g(x) are functions from the set of real numbers to the set of real numbers, then f(x) is O(g(x)) if and only if g(x) is Ω(f(x)).
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1. Prove that∀k ∈ N, 1k + 2k + · · · + nk ∈ Θ(nk+1).
2. Suppose that the functions f1, f2, g1, g2 : N → R≥0 are such that f1 ∈ Θ(g1) and f2 ∈ Θ(g2).Prove that (f1 + f2) ∈ Θ(max{g1, g2}).Here (f1 + f2)(n) = f1(n) + f2(n) and max{g1, g2}(n) = max{g1(n), g2(n)}
Let f (f(n) and g(n)) be asymptotically nonnegative functions. Using the basic definition of Θ notation, prove that max(f(n), g(n)) = Θ(f(n) + g(n)),
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Introduction to Algorithms
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- How do we define that a function f(n) has an upper bound g(n), i.e., f(n) ∈ O(g(n))?arrow_forwardProve or disprove that for any x ∈ N, x(x+1)/2 ∈ N (where N = {0, 1, 2, 3, ….}arrow_forwardApply a suitable approach to compare the asymptotic order of growth forthe following pair of functions. Prove your answer and conclude by telling if f(n) ?Ѳ(g(n)), f(n) ?O(g(n)) or f(n) ?Ω(g(n)). f(n) = 100n2+ 20 AND g(n) = n + log narrow_forward
- Let f(n) and g(n) be asymptotically nonnegative increasing functions. Prove: (f(n) + g(n))/2 = ⇥(max{f(n), g(n)}), using the definition of ⇥ .arrow_forwardPLEASE HELP ME. kindly show all your work 1. Prove that∀k ∈ N, 1k + 2k + · · · + nk ∈ Θ(nk+1). 2. Suppose that the functions f1, f2, g1, g2 : N → R≥0 are such that f1 ∈ Θ(g1) and f2 ∈ Θ(g2).Prove that (f1 + f2) ∈ Θ(max{g1, g2}). Here (f1 + f2)(n) = f1(n) + f2(n) and max{g1, g2}(n) = max{g1(n), g2(n)}. 3. Let n ∈ N \ {0}. Describe the largest set of values n for which you think 2n < n!. Use induction toprove that your description is correct.Here m! stands for m factorial, the product of first m positive integers. 4. Prove that log2 n! ∈ O(n log2 n). Thank you. But please show all work and all stepsarrow_forwardShow that a function y = n^4 + 3 can not belong to the set O(1) using the formal definition of Big-Oarrow_forward
- Let f and g be functions from the set of integers or the set of real numbers to the set of real numbers. We say that f ( x ) is O ( g ( x ) ), read as "f ( x ) is big-oh of g ( x )", if there are constants C and k such that | f ( x ) | ≤ C | g ( x ) | whenever x > k. KINDLY SHOW YOUR SOLUTION. 7. Generating sequences of random-like numbers in a specific range. Xi+1 = aXi + c Mod m where, X, is the sequence of pseudo-random numbers m, ( > 0) the modulus a, (0, m) the multiplier c, (0, m) the increment X0, [0, m) – Initial value of sequence known as seed m, a, c, and X0 should be chosen appropriately to get a period almost equal to m For a = 1, it will be the additive congruence method. For c = 0, it will be the multiplicative congruence methodarrow_forwardLet, a1 = 3, a2 = 4 and for n ≥ 3, an = 2an−1 + an−2 + n2, express an in terms of n.arrow_forwardGive an example of a function in n that is in O(√n) but not in Ω(√n). Briefly explainarrow_forward
- Suppose we have positive integers a, b, and c, such that that a and b are not relatively prime, but c is relatively prime to both a and b . Let n = s × a + t × b be some linear combination of a and b, where s and t are integers. Prove that n cannot be a divisor of c. Follow the definition of relative primes, and use contradiction.arrow_forwardIf a = x^(m+n)y^l, b=x^(n+l)y^m, and c = x^(l+m)y^n, Prove that a^(m-n)b^(n-1)c^(l-m) = 1arrow_forwardLet P2(x) be the least squares interpolating polynomial for f(x) := sin(πx) on the interval [0,1] (with weight function w(x) = 1). Determine nodes (x0,x1,x2) for the second-order Lagrange interpolating polynomial Pˆ2(x) so that P2 = Pˆ2. You are welcome to proceed theoretically or numerically using Python.arrow_forward
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