# What Do You Know About Combinatorial Geometry?

10 Questions | Attempts: 27
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In mathematics, and in particular in combinatorics, the combinatorial number system of degree k (for some positive integer k), also referred to as combinadics, is a correspondence between natural numbers (taken to include 0) N and k-combinations, represented as strictly decreasing sequences ck > . . . > c2 > c1 ≥ 0.

• 1.
The originally used term "combinatorial representation of integers" is shortened to "combinatorial number system" by?
• A.

Leibniz

• B.

Knuth

• C.

D.F Lehmer

• D.

James McCaffrey

• 2.
One could use the combinatorial number system to list or traverse all k-combinations of a given ........?
• A.

Assembly code

• B.

Characteristic vector

• C.

Finite set

• D.

Infinite set

• 3.
The term "combinadic" is introduced by who?
• A.

Knuth

• B.

James McCaffrey

• C.

Isaac Newton

• D.

D.H Lehmer

• 4.
The main purpose of the combinatorial number system is to provide a/an ......., each by a single number, of all  possible k-combinations of a set S of n elements
• A.

Application

• B.

Representation

• C.

Imitation

• D.

Emuneration

• 5.
Corresponding assembly code was described as item 175 in .....?
• A.

Primorial number system

• B.

• C.

Characteristic vectors

• D.

HAKMEM

• 6.
Combinatorial geometry is studied in ....?
• A.

Music

• B.

Mathematics

• C.

Language

• D.

History

• 7.
Distinct numbers correspond to distinct k-combinations, and produce them in .......?
• A.

Chronological order

• B.

Alphabetic order

• C.

Numeric order

• D.

Lexicography order

• 8.
Corresponding assembly code was described as ....... in HAKMEM.
• A.

Item 175

• B.

Item 250

• C.

Item 140

• D.

Item 125

• 9.
Factorial number system is also known as?
• A.

Bijection

• B.

Primorial number system

• C.

Combinatorial number system

• D.

• 10.
The fact that a unique sequence so corresponds to any number N was observed by?
• A.

D.H Lehmer

• B.

Knuth

• C.

Isaac Newton

• D.

James McCaffrey