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Probability in a random number generator function



The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Probability of Random number repeatingHow to find random number upto $2^63-1$ from a function which return random value upto $2^31-1$?What is the probability that the sum of two random numbers is less than a given number?Probability that sum of 2 random numbers are less than an integerWhat is the new probability density function by generating a random number by taking the reciprocal of a uniformly random number between 0 and 1?How to transform a random variable from [0,1] to correspond to a probability density functionHackerrank CDF of Random Variates from Two Uniform DistributionsExpanding the precision or range of a random number generatorRandom numbers generator and collision probabilityRandom Number Generator Bias Edited










-1












$begingroup$


What is the probability that a random number generator function will generate unique numbers.



Will the probability be same when the numbers are in the natural number space and real number space.










share|cite|improve this question









$endgroup$







  • 1




    $begingroup$
    According to what distribution are the numbers generated? What set are the numbers drawn from?
    $endgroup$
    – Bermudes
    Mar 25 at 8:32










  • $begingroup$
    What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
    $endgroup$
    – Matti P.
    Mar 25 at 8:34










  • $begingroup$
    @bermudes the idea is that the distribution is not known.
    $endgroup$
    – subham soni
    Mar 25 at 8:35










  • $begingroup$
    @matti unique in the sense it does not repeat itself
    $endgroup$
    – subham soni
    Mar 25 at 8:36






  • 1




    $begingroup$
    "a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
    $endgroup$
    – Arthur
    Mar 25 at 8:43
















-1












$begingroup$


What is the probability that a random number generator function will generate unique numbers.



Will the probability be same when the numbers are in the natural number space and real number space.










share|cite|improve this question









$endgroup$







  • 1




    $begingroup$
    According to what distribution are the numbers generated? What set are the numbers drawn from?
    $endgroup$
    – Bermudes
    Mar 25 at 8:32










  • $begingroup$
    What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
    $endgroup$
    – Matti P.
    Mar 25 at 8:34










  • $begingroup$
    @bermudes the idea is that the distribution is not known.
    $endgroup$
    – subham soni
    Mar 25 at 8:35










  • $begingroup$
    @matti unique in the sense it does not repeat itself
    $endgroup$
    – subham soni
    Mar 25 at 8:36






  • 1




    $begingroup$
    "a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
    $endgroup$
    – Arthur
    Mar 25 at 8:43














-1












-1








-1





$begingroup$


What is the probability that a random number generator function will generate unique numbers.



Will the probability be same when the numbers are in the natural number space and real number space.










share|cite|improve this question









$endgroup$




What is the probability that a random number generator function will generate unique numbers.



Will the probability be same when the numbers are in the natural number space and real number space.







probability






share|cite|improve this question













share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Mar 25 at 8:20









subham sonisubham soni

1164




1164







  • 1




    $begingroup$
    According to what distribution are the numbers generated? What set are the numbers drawn from?
    $endgroup$
    – Bermudes
    Mar 25 at 8:32










  • $begingroup$
    What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
    $endgroup$
    – Matti P.
    Mar 25 at 8:34










  • $begingroup$
    @bermudes the idea is that the distribution is not known.
    $endgroup$
    – subham soni
    Mar 25 at 8:35










  • $begingroup$
    @matti unique in the sense it does not repeat itself
    $endgroup$
    – subham soni
    Mar 25 at 8:36






  • 1




    $begingroup$
    "a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
    $endgroup$
    – Arthur
    Mar 25 at 8:43













  • 1




    $begingroup$
    According to what distribution are the numbers generated? What set are the numbers drawn from?
    $endgroup$
    – Bermudes
    Mar 25 at 8:32










  • $begingroup$
    What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
    $endgroup$
    – Matti P.
    Mar 25 at 8:34










  • $begingroup$
    @bermudes the idea is that the distribution is not known.
    $endgroup$
    – subham soni
    Mar 25 at 8:35










  • $begingroup$
    @matti unique in the sense it does not repeat itself
    $endgroup$
    – subham soni
    Mar 25 at 8:36






  • 1




    $begingroup$
    "a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
    $endgroup$
    – Arthur
    Mar 25 at 8:43








1




1




$begingroup$
According to what distribution are the numbers generated? What set are the numbers drawn from?
$endgroup$
– Bermudes
Mar 25 at 8:32




$begingroup$
According to what distribution are the numbers generated? What set are the numbers drawn from?
$endgroup$
– Bermudes
Mar 25 at 8:32












$begingroup$
What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
$endgroup$
– Matti P.
Mar 25 at 8:34




$begingroup$
What's your definition of a 'unique' number? Is $frac1sqrt2$ a unique number?
$endgroup$
– Matti P.
Mar 25 at 8:34












$begingroup$
@bermudes the idea is that the distribution is not known.
$endgroup$
– subham soni
Mar 25 at 8:35




$begingroup$
@bermudes the idea is that the distribution is not known.
$endgroup$
– subham soni
Mar 25 at 8:35












$begingroup$
@matti unique in the sense it does not repeat itself
$endgroup$
– subham soni
Mar 25 at 8:36




$begingroup$
@matti unique in the sense it does not repeat itself
$endgroup$
– subham soni
Mar 25 at 8:36




1




1




$begingroup$
"a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
$endgroup$
– Arthur
Mar 25 at 8:43





$begingroup$
"a random number generator" is incredibly vague. Do you take all RNG's ever devised (including this one), and pick one at random, or do you have a specific one in mind? Because there are a lot of different ones with very varying amounts of unpredictability.
$endgroup$
– Arthur
Mar 25 at 8:43











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