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Се дава поим за множество, негово означување и видови множества


Поимот за множество е основен поим во математиката и тој стриктно не се дефинира со прецизна дефиниција.

Под поимот множество се подразбира збир или колекција на објекти кои најчесто имаат некое заедничко својство. Членовите на множеството се нарекуваат елементи .

За означување на множествата се користат големите букви од латиницата, како на пр. множества A, B, …, X. Елементите на множеставата се означуваат со малите букви од латиницата како на пример: a , b , c , . . . , x size 12{a,b,c, "." "." "." ,x} {} . Множеството може да се претстави табеларно со наведување на своите елементи во голема заграда, на пр.

A = { a , b , c } size 12{ lbrace a,b,c rbrace } {}

или описно, со наведување на својството што го поседуваат елементите на множеството како на пр.

X={x|x е студент на ТМФ},

B={z|z е парен природен број}.

Ако множеството има конечен број на елементи тоа се нарекува конечно множество , а во спротивно се нарекува бесконечно .

Припадностa на елементoт a size 12{a} {} на множество А се означува со a A size 12{a in A} {} , додека неприпадноста на множеството B се означува со a B size 12{a notin B} {} .

По дефиниција, множеството кое не содржи ниту еден елемент се нарекува празно множество .

Во математиката се користат симболи кои искажуваат одредени зборови кои одредуваат “количина” или “колку се” елементи од некое множество. Тие симболи се нарекуваат квантификатори и такви се:

size 12{ forall } {} - кој го заменува зборот “за секое” или “произволно”,

size 12{ exists } {} - кој го заменува зборот “постои”или “постои некое”.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Математика 1. OpenStax CNX. Nov 17, 2014 Download for free at http://legacy.cnx.org/content/col11377/1.12
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