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Title:Alspachova neenakost
Authors:ID Čepe, Sandra (Author)
ID Eremita, Daniel (Mentor) More about this mentor... New window
Files:.pdf UNI_Cepe_Sandra_2013.pdf (430,47 KB)
MD5: 4A9CED064BFDD9C7E1A934816C005747
PID: 20.500.12556/dkum/498a1301-c6da-4005-83ba-8d76780d41b6
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:Osrednja tema diplomskega dela je dokaz Alspachove neenakosti in iskanje zgornjih mej vsote glavnih deliteljev. Dokazano je, da je vsako liho naravno število n > 15, ki ni potenca praštevila, večje od dvakratnika vsote glavnih deliteljev števila n. V diplomskem delu so v uvodnih treh poglavjih predstavljeni osnovni pojmi elementarne teorije števil, aritmetične funkcije, popolna števila in Mersennova praštevila. V četrtem poglavju so obravnavani Alspachova neenakost, Bernoulli-Weierstrassova neenakost, aritmetična in geometrijska sredina. Izpeljane so tudi nekatere bolj natančne zgornje meje vsote glavnih deliteljev.
Keywords:praštevila, aritmetične funkcije, popolna števila, Mersennova praštevila, Alspachova neenakost, aritmetična in geometrijska sredina.
Place of publishing:Maribor
Publisher:[S. Čepe]
Year of publishing:2013
PID:20.500.12556/DKUM-39619 New window
UDC:51(043.2)
COBISS.SI-ID:19747080 New window
NUK URN:URN:SI:UM:DK:6YOXFWZL
Publication date in DKUM:19.03.2013
Views:2011
Downloads:158
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Secondary language

Language:English
Title:Alspach's inequality
Abstract:Main topic of the graduation thesis is to present a proof of Alspach's inequality and to obtain some further upper bounds on the sum of principal divisors of an integer. We prove, that any odd integer n > 15 that is not a prime-power is greater than twice the sum of its principal divisors. In the first three chapters of the thesis we present basic notions and results of elementary number theory, arithemtic functions, perfect numbers and Mersenne primes numbers. In the fourth chapter we consider Alspach's inequality, Bernoulli- Weierstarss inequality, arithmetic and geometric mean. Some stronger upper bounds on sums of principal divisors are also obtained.
Keywords:primes, arithmetic functions, perfect numbers, Mersenne primes, Alspach's inequality, arithmetic and geometric mean.


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