Timeline for Is it considered a mistake to use different correct notation for writing intervals?
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
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| May 6, 2022 at 0:34 | comment | added | paul garrett | There's no "reasoning behind doing the opposite of convention, thereby wildly failing to communicate". It's not that "in math" we can/should routinely declare that "yes" means "no", and vice-versa, ... even though, in principle, we would do such stuff. | |
| May 5, 2022 at 19:27 | answer | added | Reuleaux | timeline score: 1 | |
| May 4, 2022 at 1:38 | comment | added | paul garrett | Such a choice is sort-of like driving "on the wrong side of the road": it's not abstractly "wrong", but depending whether you're in the UK v.s. US it has vast practical ramifications. | |
| May 3, 2022 at 12:37 | comment | added | kcrisman | "The student is wrong; they cannot both be used." - there are oriented paths, and hence an oriented interval could work for this in one dimension. But agreed that in context it's almost certainly not what is implied. | |
| May 3, 2022 at 12:34 | answer | added | kcrisman | timeline score: 1 | |
| May 2, 2022 at 16:14 | comment | added | Daniel R. Collins | "The student knows both notations can be used..." The student is wrong; they cannot both be used. | |
| May 1, 2022 at 17:51 | answer | added | guest troll | timeline score: -2 | |
| May 1, 2022 at 17:02 | comment | added | Dave L Renfro | Unless I were told explicitly about the alternate notation (and I'd wonder why use it, and if it were a paper or book, that would be a huge red flag for me continuing to read/browse the item), I would assume something like $(3,2)$ is equal to the empty set. Indeed, sometimes it's helpful to have this convention to avoid special cases in expressions and theorem statements, although authors should be explicit about this convention also. | |
| May 1, 2022 at 16:11 | comment | added | Sue VanHattum♦ | I'm not sure why you say "both notations can be used", since you didn't say that there was a reason this non-standard notation was usable. | |
| May 1, 2022 at 13:28 | vote | accept | nuF sI htaM | ||
| May 1, 2022 at 13:20 | answer | added | Xander Henderson♦ | timeline score: 11 | |
| May 1, 2022 at 12:06 | answer | added | Tommi | timeline score: 6 | |
| May 1, 2022 at 11:11 | comment | added | nuF sI htaM | There was no any intention, the student knows both are correct and writes (a,b) where a>b due to added - in front of b.Originally it was written as (a,b) where a<b, but later on the minus itself changed the notation.The student knows both notations can be used so doesn't swap places due to hypothetically speaking not being allowed to correct it | |
| May 1, 2022 at 11:03 | comment | added | Michał Miśkiewicz | The way you describe it, there's no reasoning behind it and there couldn't be, as it's just a convention. Does the student explicitly introduce the conflicting non-standard notation? But first of all, why? Just to make the grader angry? | |
| S May 1, 2022 at 10:49 | review | First questions | |||
| May 1, 2022 at 13:21 | |||||
| S May 1, 2022 at 10:49 | history | asked | nuF sI htaM | CC BY-SA 4.0 |