п/2 f (x) = [«(xz – x-1)? + (1 – x2i-1)°], i=1 re a is a parameter that you can vary (for example, 1 or 100). The solution ,..., 1)", f* = 0. Choose the starting point as (-1, –1, ..., –1)". Obs avior of your program for various values of the memory parameter m.
п/2 f (x) = [«(xz – x-1)? + (1 – x2i-1)°], i=1 re a is a parameter that you can vary (for example, 1 or 100). The solution ,..., 1)", f* = 0. Choose the starting point as (-1, –1, ..., –1)". Obs avior of your program for various values of the memory parameter m.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Help me with the Python code .
![7.1 Code Algorithm 7.5, and test it on the extended Rosenbrock function
п/2
f (x) = [«(x2; – x-1)² + (1 – x2i-1)²],
i=1
where a is a parameter that you can vary (for example, 1 or 100). The solution is x*
(1, 1, ..., 1)", f*
behavior of your program for various values of the memory parameter m.
= 0. Choose the starting point as (-1, –1, ..., –1)". Observe the](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdc8424dd-54af-4eb1-809a-68981165dbdf%2F29761e48-4e89-4bb8-9c28-ad76a6648d9f%2Fdl5hlhh_processed.png&w=3840&q=75)
Transcribed Image Text:7.1 Code Algorithm 7.5, and test it on the extended Rosenbrock function
п/2
f (x) = [«(x2; – x-1)² + (1 – x2i-1)²],
i=1
where a is a parameter that you can vary (for example, 1 or 100). The solution is x*
(1, 1, ..., 1)", f*
behavior of your program for various values of the memory parameter m.
= 0. Choose the starting point as (-1, –1, ..., –1)". Observe the
Transcribed Image Text:Algorithm 7.5 (L-BFGS).
Choose starting point xo, integer m > 0;
k + 0;
repeat
Choose H (for example, by using (7.20));
Compute pr +
– H¿V fr from Algorithm 7.4;
Compute xk+1 + Xk + ak Pk, where ar is chosen to
satisfy the Wolfe conditions;
if k > m
Discard the vector pair {sk-m, Yk-m} from storage;
Compute and save sk – Xk+1 – Xk, Yk = V fk+1 – V fk;
k + k+ 1;
-1-
until convergence.
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