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International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

RESEARCH ARTICLE ISSN: 2321-7758

OBSERVATIONS ON RHOMBIC DODECAHEDRAL

M.A.GOPALAN 1,V.SANGEETHA*,MANJU SOMANATH 2 1Professor,Department of ,Srimathi Indira Gandhi College,Trichy-2,India. *Assistant Professor,Dept.of Mathematics, National College,Trichy-1,India. Phone:9790451555,e-mail:[email protected] 2 Assistant Professor,Dept.of Mathematics, National College,Trichy-1,India.

Article Received: 16/09/2013 Article Revised on: 20/09/2013 Article Accepted on:21/09/2013

ABSTRACT We obtain different relations among Rhombic Dodecahedral Number and other two, three and four dimensional figurate .

Keywords-, , Centered Polygonal number, Centered Pyramidal number, Rhombic Dodecahedral number, Special numbers. MSC Classification Number: 11D99

V.SANGEETHA Author for Correspondence :

Email:prasansangee@ gmail.com

INTRODUCTION Fascinated by beautiful and intriguing number polygonal numbers can be summed up to form solid patterns, famous mathematicians, share their three dimensional figurate numbers called Pyramidal insights and discoveries with each other and with numbers [1,4,5and 6].In this communication,we deal readers. Throughout history, number and numbers with a special number called Rhombic Dodecahedral [2,3,7-18] have had a tremendous influence on our Number and various culture and on our language. Polygonal numbers can interesting relations among these numbers are be illustrated by polygonal designs on a plane. The - exhibited by means of theorems involving the relations.

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International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

Notation - Rhombic Dodecahedral number - Polygonal number of rank n with sides m - Centered Polygonal number of rank n with sides m - Pyramidal number of rank n with sides m - Centered Pyramidal number of rank n with sides m - Prism number of rank n with sides m - of rank n - Gnomonic number - - Centered Octahedral number - Icosahedral number - Centered Icosahedral number - Dodecahedral number - Stella octangula number - Centered Dodecahedral number - Centered number - Centered number - Truncated -Truncated Octahedral number - - Hauy Rhombic Dodecahedral number - Hauy Octahedral number - nth d-dimensional nexus number - m-gram number of rank n - INTERESTING RELATIONS

1. Proof:

2. Proof:

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International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

3. Proof:

4. Proof:

5. Proof:

6. Proof:

7. Proof:

8. Proof:

9. Proof:

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International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

10. Proof:

11. Proof:

12. Proof:

13. Proof:

14. Proof:

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International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

15. Proof:

16. is a Square . Proof:

17. Proof:

18. Proof:

19. is a Nasty Number. Proof:

. 20. is a Cubic integer. Proof:

. 21. is a Nasty number. Proof:

287 V.SANGEETHA et al

International journal of Engineering Research-Online A Peer Reviewed International Journal Vol.1., Issue.2., 2013 Articles available onlne http://www.ijoer.in

22. Proof:

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