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How do you start to solve the following integral?
Thanks -- MentalPower 01:43, 23 February 2007 (UTC)
I was very sleepy when I did this last night so theres a good chance it is wrong. I was trying to figure out much time would go by for a person going at 99% of c from here to the Andromeda galaxy and back. Using the equations found in time dilation, I figured that about 721,520 years would go by for them (more than I expected), while about 5,114,716 years would go by for a person back on Earth. Could one of you mathies check my math real quick? Thanks much in advance. Imaninjapirate talk to me 02:08, 23 February 2007 (UTC)
I was wondering, if it is possible to make a triangle in conjunction with Non-Euclidean geometry that is more than 270 degrees? —Preceding unsigned comment added by 124.191.241.62 ( talk • contribs)
In my probability courses I've come across (and used) the notation 1{A} (where the 1 is meant to be "Blackboard Bold") to respresent a function that takes a value 1 when the event A is true and 0 when the event A is false.
I've just used it in a different course to avoid the joy of writing 0r when dealing with the case r=0. Instead, I used 1{r=0}, i.e. 1 if r=0 or 0 otherwise.
However, I'm aware this may not be standard notation, so my question is:
What would you call this function? Only thing I could think of was the identity function, and I know that's not right.
Many thanks. Rawling 4851 12:12, 23 February 2007 (UTC)
Mathematics desk | ||
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< February 22 | << Jan | February | Mar >> | February 24 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
How do you start to solve the following integral?
Thanks -- MentalPower 01:43, 23 February 2007 (UTC)
I was very sleepy when I did this last night so theres a good chance it is wrong. I was trying to figure out much time would go by for a person going at 99% of c from here to the Andromeda galaxy and back. Using the equations found in time dilation, I figured that about 721,520 years would go by for them (more than I expected), while about 5,114,716 years would go by for a person back on Earth. Could one of you mathies check my math real quick? Thanks much in advance. Imaninjapirate talk to me 02:08, 23 February 2007 (UTC)
I was wondering, if it is possible to make a triangle in conjunction with Non-Euclidean geometry that is more than 270 degrees? —Preceding unsigned comment added by 124.191.241.62 ( talk • contribs)
In my probability courses I've come across (and used) the notation 1{A} (where the 1 is meant to be "Blackboard Bold") to respresent a function that takes a value 1 when the event A is true and 0 when the event A is false.
I've just used it in a different course to avoid the joy of writing 0r when dealing with the case r=0. Instead, I used 1{r=0}, i.e. 1 if r=0 or 0 otherwise.
However, I'm aware this may not be standard notation, so my question is:
What would you call this function? Only thing I could think of was the identity function, and I know that's not right.
Many thanks. Rawling 4851 12:12, 23 February 2007 (UTC)