General relation between sums of figurate numbers
In this study, we seek to find relations between the number of representations of a nonnegative integer n as a sum of figurate numbers of different types. Firstly, we give a relation between the number of representations, ck(n), of n as the sum k cubes and the number of representations, pk(n), of...
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my-upm-ir.676832019-03-26T04:14:11Z General relation between sums of figurate numbers 2013-04 Mohamat Johari, Mohamat Aidil In this study, we seek to find relations between the number of representations of a nonnegative integer n as a sum of figurate numbers of different types. Firstly, we give a relation between the number of representations, ck(n), of n as the sum k cubes and the number of representations, pk(n), of n as the sum of k triangular pyramidal numbers, namely under certain conditions pk(n) = c k odd (v); where c k odd denotes the number of representations as a sum of k odd cubes and the integer v is derived from n. Then we extend this problem by considering sums of s-th powers with s > 3 and the associated polytopic numbers of order s. Next, we discuss the relation between ɸ(2;k)(n), the number of representations of n as a sum of k fourth powers, and ψ(2;k)(n), the number of representations of n as a sum of k terms of the form 8γ2 + 2γ where γ is a triangular number. When 1 ≤ k ≤ 7, the relation is ɸ(2;k)(8n + k) = 2kψ (2;k) (n). We extend this result by considering the relation between the number of represen- tations of n as a sum of k 2m-th powers and the number of representations of n as a sum of k terms determined by an associated polynomial of degree m evaluated at a triangular number. Thirdly, we consider the relation between sk(n), the number of representations of n as a sum of k squares, and ek(n), the number of representations of n as a sum of k centred pentagonal numbers. When 1 ≤k ≤ 7, this relation is αkek(n) = sk (8n -3k)÷5 ; where αk = 2k + 2k-1 (k4) We extend the analysis to the number of representations induced by a partition γ of k into m parts. If corresponding number of representations of n are respectively sγ(n) and eγ(n), then βγeγ(n) = sγ(8n - 3k)÷5 where βγ = 2m + 2(m-1) (( i1/4) + (i1/2)(i2/1)+(i1/1)(i3/1) and ij denotes the number of parts of γ which are equal to j. We end this thesis with a short discussion and proposal of various open problems for further research. Mathematics Numbers, Polygonal 2013-04 Thesis http://psasir.upm.edu.my/id/eprint/67683/ http://psasir.upm.edu.my/id/eprint/67683/1/IPM%202013%209%20IR.pdf text en public doctoral Universiti Putra Malaysia Mathematics Numbers, Polygonal |
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Universiti Putra Malaysia |
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English |
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Mathematics Mathematics |
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Mathematics Mathematics Mohamat Johari, Mohamat Aidil General relation between sums of figurate numbers |
| description |
In this study, we seek to find relations between the number of representations of a
nonnegative integer n as a sum of figurate numbers of different types.
Firstly, we give a relation between the number of representations, ck(n), of n as
the sum k cubes and the number of representations, pk(n), of n as the sum of k
triangular pyramidal numbers, namely under certain conditions
pk(n) = c k odd (v);
where c k odd denotes the number of representations as a sum of k odd cubes and the
integer v is derived from n. Then we extend this problem by considering sums of
s-th powers with s > 3 and the associated polytopic numbers of order s.
Next, we discuss the relation between ɸ(2;k)(n), the number of representations of
n as a sum of k fourth powers, and ψ(2;k)(n), the number of representations of n as a sum of k terms of the form 8γ2 + 2γ where γ is a triangular number. When
1 ≤ k ≤ 7, the relation is
ɸ(2;k)(8n + k) = 2kψ (2;k) (n).
We extend this result by considering the relation between the number of represen-
tations of n as a sum of k 2m-th powers and the number of representations of n as
a sum of k terms determined by an associated polynomial of degree m evaluated
at a triangular number.
Thirdly, we consider the relation between sk(n), the number of representations of
n as a sum of k squares, and ek(n), the number of representations of n as a sum
of k centred pentagonal numbers. When 1 ≤k ≤ 7, this relation is
αkek(n) = sk (8n -3k)÷5 ; where αk = 2k + 2k-1 (k4)
We extend the analysis to the number of representations induced by a partition γ
of k into m parts. If corresponding number of representations of n are respectively
sγ(n) and eγ(n), then
βγeγ(n) = sγ(8n - 3k)÷5
where
βγ = 2m + 2(m-1) (( i1/4) + (i1/2)(i2/1)+(i1/1)(i3/1)
and ij denotes the number of parts of γ which are equal to j.
We end this thesis with a short discussion and proposal of various open problems
for further research. |
| format |
Thesis |
| qualification_level |
Doctorate |
| author |
Mohamat Johari, Mohamat Aidil |
| author_facet |
Mohamat Johari, Mohamat Aidil |
| author_sort |
Mohamat Johari, Mohamat Aidil |
| title |
General relation between sums of figurate numbers |
| title_short |
General relation between sums of figurate numbers |
| title_full |
General relation between sums of figurate numbers |
| title_fullStr |
General relation between sums of figurate numbers |
| title_full_unstemmed |
General relation between sums of figurate numbers |
| title_sort |
general relation between sums of figurate numbers |
| granting_institution |
Universiti Putra Malaysia |
| publishDate |
2013 |
| url |
http://psasir.upm.edu.my/id/eprint/67683/1/IPM%202013%209%20IR.pdf |
| _version_ |
1747812499489554432 |