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Jadaav
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Is Zero a positive or negative whole number ? Is it even a whole number ?
Jadaav said:Is Zero a positive or negative whole number ? Is it even a whole number ?
I disagree with the first two answers. A positive number is one that is greater than zero. A negative number is one that is less than zero.phinds said:yes, yes, yes
The number zero is neither positive or negative, and therefore has no sign.
In arithmetic, +0 and −0 both denote the same number 0, and the negation of zero is zero itself.
In some contexts, such as signed number representations in computing, it makes sense to consider signed versions of zero, with positive zero and negative zero being different numbers (see signed zero).
One also sees +0 and -0 in calculus and mathematical analysis when evaluating certain limits. This notation refers to the behaviour of a function as the input variable approaches 0 from positive or negative values respectively; these behaviours are not necessarily the same.
Studiot said:One further comment for discussion.
Is zero odd or even?
I don't think anyone picked up on this. Noon is neither AM (ante meridiem = before noon) nor PM (post meridiem = after noon). So technically, the time should be written as 12:00 noon, not 12:00AM or 12:00PM.mathwonk said:is noon am or pm?
Mark44 said:I don't think anyone picked up on this. Noon is neither AM (ante meridiem = before noon) nor PM (post meridiem = after noon). So technically, the time should be written as 12:00 noon, not 12:00AM or 12:00PM.
Same with midnight.
I don't think anyone picked up on this. Noon is neither AM (ante meridiem = before noon) nor PM (post meridiem = after noon). So technically, the time should be written as 12:00 noon, not 12:00AM or 12:00PM.
micromass said:That is, we can have 0=ab without a and b invertible...
What do they have to do with the arrow of time?agentredlum said:About 12:00 am and 12:00 pm, both notations follow the arrow of time so there is nothing wrong with them.
Depends if you expect your guests to be late or early for an appointment, I guess...Mark44 said:In any case, going by the literal definitions of AM and PM, which translate to "before noon" and "after noon" respectively, it doesn't make sense to write 12:00 AM or 12:00 PM.
But like I said earlier, I'm very sure that it will be strictly correct (following your definition) whenever it is seen displayed "in real time," e.g., on a clock.That's not to say that you won't see these all over the place.
Mark44 said:What do they have to do with the arrow of time?
agentredlum said:One must begin a new day somewhen, even if it is in the middle of the night.
olivermsun said:Ah, but then one must also end the previous day somewhen.
Mark44 said:In any case, going by the literal definitions of AM and PM, which translate to "before noon" and "after noon" respectively, it doesn't make sense to write 12:00 AM or 12:00 PM. That's not to say that you won't see these all over the place.
Well, a digital clock will display 12:00 for a whole minute, but the transition to 12:01 takes a minute, which is only a tad less than a minute longer than the moment of transition you mentioned, and considerably less than an infinity longer.ArcanaNoir said:But it is 12:00 for a whole minute, that's an infinity longer than the infinitesimal moment of transition between ante/post meridian.
ArcanaNoir said:12:00:01 is already am or pm justifiably. as is 12:00:00:00...:01 to a point where your clock could withhold the am/pm specification for the briefest moment and then display am or pm, and your eyes could never tell that it hesitated.
Digital clocks and computers commonly display 12 p.m. for noon. While that phrase may be used practically, it helps to understand that any particular time is actually an instant. The "p.m." shown on clock displays refers to the 12-hour period following the instant of noon, not to the instant itself.
While computers and digital clocks display "12:00 a.m." and "12:00 p.m." these notations provide no clear and unambiguous way to distinguish between midnight and noon. It is actually improper to use "a.m." and "p.m." when referring to 12:00. The abbreviation a.m. stands for ante meridiem (or before the meridian) and p.m. stands for post meridiem (or after the meridian), with the meridian being 12:00 noon. For this reason, neither abbreviation is correct for noon or midnight.[4] The length of the error is determined by the smallest unit of time: 12:00:01 p.m. would be correctly notated, as would even 12:00:00.00001 pm.
Jadaav said:I got another question now after reading the previous posts :
How did they started to measure time accurately ? I mean how did they knew if it was midnight today or tomorrow morning ?
Jadaav said:Zero in common sense to me means nothing. I think this is obvious to everyone since once your teacher said " Zero is when you have nothing ". The problem to zero is not zero itself but in fact its the concept of nothing.
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phinds said:I don't agree w/ this at all. If you are asked the question what's two minus two, do you say there is no answer? Saying zero is nothing sounds to me like saying that zero is the absence of information and that's not the case.
Jadaav said:Zero in common sense to me means nothing. I think this is obvious to everyone since once your teacher said " Zero is when you have nothing ". The problem to zero is not zero itself but in fact its the concept of nothing.
Long time back, vacuum was considered to be nothing. But now, scientist doesn't agree with that due to the expected presence of Dark Matter and Dark Energy. No one can explain what nothingness really is.
Jadaav said:OK, I'll start a new thread. But it sounded to be related to this topic to me.
how ? why is it not the absence of information ?
ArcanaNoir said:It's equally incorrect to argue that there's some moment between December 31 and January 1 where we can't say it's either last year or next year. I don't think that moment exists, I think our time measurement dictates that the one ends precisely when the other begins. There is no "0".
Travis_King said:How many million dollar bills do you have in your wallet?
Travis_King said:Ah, though, yea there is. It exists between 23:59.99 and 00:00.01