Computers and Technology, 07.03.2020 00:09, mleighaj9560
This question asks you to define a SCHEME function that computes the Bell numbers. The nth Bell number is the number of partitions" of n objects. To be precise, it is the number of ways to write the set {1,...,n} as a union of a family of disjoint subsets. Equivalently, it is the number of ways to take n items and arrange them into piles. For example, B3, the 3th Bell number, is equal to 5 because the set {1,2,3} has 5 different partitions: {1,2,3}, {1,2} U {3}, {1,3} {2} {1}U {2,3}, and {1} U {2} {3}. It might be worth defining the function b(n, k) equal to the number of ways that {1,...,n} can be expressed as a partition into exactly k sets; note then that Bn = bin, 1) + ... + b(n, n). Note, also, that the bin, k) satisfy a rather nice recursive relationship: bĂn, k) = k. b(n - 1,k) + b(n - 1, k-1). (To see this, notice that partitions of {1,...,n} can be divided into two different types: those where n is by itself in a singleton set), and those where it appears with some other elements. If you remove the element n from the first type of partition, you obtain a partition of n-1 objects into k-1 sets—there are bin - 1, k-1) of these; if you remove n from the second type of partition, you obtain a partition of n-1 objects into k sets—there are b(n-1,k) of these.) Use this recursive rule to give a simple SCHEME definition for B. If you define a separate auxiliary function to compute b(n, k), make sure you keep it local to your function that computes the Bell number.
Answers: 2
Computers and Technology, 22.06.2019 04:30, justbepunky
There is a simple pattern for determining if a binary number is odd. what is it and why does this pattern occur? how many bits would you need if you wanted to have the ability to count up to 1000? how high could you count in binary if you used all 10 of your fingers as bits? (finger up means 1, finger down means 0)
Answers: 3
Computers and Technology, 22.06.2019 08:00, lindseyreneesmith7
Digital information is stored using a series of ones and zeros. computers are digital machines because they can only read information as on or off –1 or 0. this method of computation is known as the system
Answers: 1
Computers and Technology, 23.06.2019 08:30, Bradgarner772
Based on your knowledge of a good network, describe what you think is a perfect network would be. what kind of information and resources could users share on this network. what would the network administrator do? what kind of communication would be used?
Answers: 1
This question asks you to define a SCHEME function that computes the Bell numbers. The nth Bell numb...
Social Studies, 19.09.2021 05:10
Mathematics, 19.09.2021 05:10
Social Studies, 19.09.2021 05:10
Mathematics, 19.09.2021 05:10