Timeline for Why do we teach complex numbers?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Feb 22, 2023 at 7:32 | comment | added | Ruslan | @user24096 indeed, and Google is also helpful to provide some relevant search results and suggested queries, while the answer of WA is quite insensible to those who had never heard of the imaginary unit (though why would you query a square root of a negative number if you don't suspect what the answer might be?). | |
| Feb 22, 2023 at 4:54 | comment | added | user18187 | @Ruslan: Nowadays if you enter $\sqrt {-1}$ in say Google or Wolfram Alpha, you do get "$i$". | |
| S Nov 17, 2022 at 22:16 | history | suggested | Glorfindel | CC BY-SA 4.0 | broken link fixed |
| Nov 15, 2022 at 19:16 | review | Suggested edits | |||
| S Nov 17, 2022 at 22:16 | |||||
| Sep 27, 2016 at 15:48 | comment | added | Ruslan | @JpMcCarthy I suppose students do know that no real number has negative square. This has been known to people far earlier than complex numbers were invented. | |
| Sep 27, 2016 at 14:33 | comment | added | JP McCarthy | @Ruslan --- yes I know this: I am saying that the students will ask what the "error" means | |
| Sep 27, 2016 at 12:35 | comment | added | Ruslan | @JpMcCarthy is it a question? The error means that the result can't be represented/approximated as an N-digit real number. You get the same error on overflow or division by zero. | |
| Sep 27, 2016 at 11:47 | comment | added | JP McCarthy | @Ruslan yes...what does that error mean. | |
| Sep 25, 2016 at 6:58 | comment | added | Ruslan | The majority of calculators, even scientific/engineering ones will give you an error, not $i$. | |
| Sep 24, 2016 at 20:57 | comment | added | Dag Oskar Madsen | Welcome to the site. Could you summarize the answer from Dr. Math? | |
| Sep 24, 2016 at 20:04 | review | First posts | |||
| Sep 24, 2016 at 20:57 | |||||
| Sep 24, 2016 at 20:04 | history | answered | netskink | CC BY-SA 3.0 |