# Ordered set

A problem asks to count the number of ordered sets of 4 numbers that sum up to 10, here ordered means either the sequence is increasing where each next element is either greater or equal to the previous, or decreasing, where each element is less or equal to the previous?

Note by Ervin Kamberoski
5 years, 4 months ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

Sort by:

Ordered set refers to the order in which the elements appear. For example, the ordered set ( Alvin, Calvin, 501) is different from the ordered set (501, Alvin, Calvin). It has nothing to do with the order of the elements of the set, since we may not presume that the elements have a natural ordering.

Staff - 5 years, 4 months ago

Comment deleted Feb 18, 2013

Not sure this makes it clearer.

- 5 years, 4 months ago

×