• Zwiebel@feddit.org
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    1 month ago

    Sorry but there is no math government that can enforce rules, and the order of operations isn’t intrinsic either. It is just something people agreed upon volununtarily, aka a convention

      • Zwiebel@feddit.org
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        20 days ago

        My dude sit in a university lecture for math majors.

        Your school books arent gospel

          • 💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱@programming.dev
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            2 days ago

            I explained why here

            And you were proven wrong elsewhere (since you ran your rubbish to the maximum comment depth), but admitted to not reading it, speaking of proving you were the bad faith one all along 🙄

            So, now that I’ve found a place I can reply to your other non-repliable posts…

            Even if you corner them on something

            Which no-one ever has 🙄

            they absolutely will not budge

            See how many Mathematicians and Maths teachers you can gaslight into believing that they and Maths textbooks are all wrong, I’ll wait.

            I like many others brought up calculators and how common basic calculators only evaluate from left to right

            And you hilariously provided a manual that proved you were wrong about that! 😂

            He asserted (without evidence) that the first does not operate in this way

            It’s right there in the manual, as I pointed out 😂

            even though the manual says that you must re-order some expressions so that bracketed sub-expressions come first

            That’s right, because it doesn’t have brackets keys 🙄 So you have to enter that first, then press the equals key to make it evaluate that first, because it doesn’t evaluate from left to right otherwise, it will do the multiplication first 🙄

            still will not admit that he was wrong about his claim

            says person who still will not admit he was wrong about his claim that all basic calculators working that way, even though the manual proves there are some that don’t 😂

            you will not convince him of anything no matter what the evidence is

            Says person refusing to believe all evidence, including the calculator manual 😂

            he fundamentally cannot separate mathematics from the notation

            Nope liar. I’m the one who keeps pointing out they are different 🙄 Go ahead and find a screenshot of me saying they’re the same, I’ll wait

            He calls a×b multiplication and ab a product.

            As per Maths textbooks, which you keep ignoring 🙄

            These are, of course, the exact same thing

            says person who not only can’t give a single textbook which says that, but refused to answer my question about

            For a=2, b=3

            1/ab=1/(2x3)=1/6

            1/axb=1/2x3=3/2

            which of those, according to you, is the correct answer, given you insist they are “the same thing” 🙄

            implicit multiplication

            There’s no such thing. Go ahead and find a Maths textbook that says so, I’ll wait

            ab can, by some conventions, have a higher precedence than does the explicit multiplication in a×b

            Literally always does, as per the rules of Maths, as found in Maths textbooks 🙄

            he has taken that to mean that they are fundamentally different

            So go ahead and explain how “the same thing”, according to you, can give different answers in all textbooks. I’ll wait

            He thinks that a(b+c)=ab+bc is something to do with notation

            The Distributive Law actually, another rule of Maths 🙄

            not a fundamental relationship between multiplication and addition

            There’s no multiplication in The Distributive Law, only in The Distributive Property 🙄

            I will say that no author would distinguish those two terms

            Except, of course, for all the ones who do 😂

            because they’re just too easily confused

            says person confused about the difference between a Law and a Property 😂

            And many authors explicitly say that one is also known as the other

            says person who can’t even cite a single example of such

            He says that a×(b+c) = ab + bc is an instance of the “distributive property”

            ax(b+c)=axb+axc actually.

            You seem to think notation is only correct at exactly the level you claim to teach

            Nope, every level after Primary school

            Elementary school children get taught parentheses means you do stuff inside parentheses first

            Because they haven’t been taught The Distributive Law yet, and there is no outside brackets for them - they don’t learn that until Year 7

            college calculus students get taught parentheses mean you do stuff inside parenthesis first

            No they don’t.

            despite two centuries of textbooks showing that is in fact how parentheses work

            You’re the one ignoring the 2 centuries of textbooks dude 😂

            All published textbooks and all pragmatic mathematics operate as though your pet peeve does not exist

            says person who can’t cite a single such example, again 🙄

            It’s almost like the shit you insist upon is completely made-up, and does not matter to anyone besides you

            says person who actually made up that Multiplication and Products are the same thing 🙄

            I thought they were called “products” not “multiplications”

            That’s right. You know you’re referring to a 1912 textbook, right? Terminology has moved on since then, as demonstrated by the 1965 textbook 😂

            I’m just trying to give you more opportunities to prove that you’re not just a troll

            says person who ignored all the textbooks I posted, whilst not citing any themselves 🙄

            You insist you’re talking about mathematical rules that cannot be violated, so it should be no problem to find an explicit mention of them

            I provided many, which you ignored 🙄

            you are saying that the practice of calculators, mathematical tools, programming languages and mathematical software are all wrong

            Nope, liar. All my calculators give correct answers (Sharp, Casio, Omron - only Texas Instruments breaks the mold these days), and programmers disobeying the rules of Maths doesn’t prove they not rules of Maths. 🙄 You are the one claiming that Sharp and Casio calculators are giving wrong answers. 🙄 I’m guessing that your calculator, if you even have one (which seems doubtful from what I’ve seen) is a Texas Instruments one.

            that you are right

            My caclulators and textbooks are correct, yes. 🙄

            that my interpretation of your own textbooks is wrong

            says person who read one sentence and stopped there and did some mental gymnastics with it, ignoring that the whole rest of the book contradicts that interpretation 🙄

            if you show no ability to admit error

            says the person who actually made errors.

            admit that disagreement from competing authorities

            There isn’t any “disagreement from competing authorities”. 😂 Every single textbook, not just Maths, but Physics, Chemistry, Engineering, etc., obeys the exact same rules 😂

            As my own show of good faith, I

            didn’t look at any of the examples about Distribution and Terms, speaking of proving you are the bad faith person 🙄

            I’ll explain why I think this is a bad convention

            and you would be wrong, just like you are about everything else

            why the formal first-order language of arithmetic doesn’t have this convention

            No-one cares why a niche topic, only taught at University, is different to the general rules taught to everyone at high school 🙄

            the distributive law is something you must do instead of a property of multiplication that you can use to aid in the manipulation of algebraic expressions but don’t have to

            That’s right, as per Maths textbooks

            Folded into their inability to understand that some aspects of maths are custom and convention

            Says person who has an inability to tell the difference between a convention and the rules 🙄

            Somewhere along the way he seems to think that distributivity is something to do with brackets instead of something to do with addition and multiplication

            Law Vs. Property, not complicated!

            if I can get him to actually cop to any of his verifiable mistakes

            Of which there are none as opposed to you who has several verifiable mistakes 🙄

            back up any of his whackadoodle claims with direct references

            You’ve been given them, and you ignored them

            Tomorrow I’m expecting another wall of text responding to every single word except the ones where I ask for such an admission

            says person who has still failed to show anywhere that I was mistaken 🙄 On the other hand you have refused to admit to your mistakes

            I’ll have satisfied myself he’s a lost cause

            Actually, you admitted to not even reading it - that’s something which people who know they are wrong do 🙄

            been pushing his wrong ideas of what the distributive law are, since 2023

            says person again ignoring the Maths textbooks 🙄

            Notice how the text never says “you MUST use the distributive law”?

            I notice how you have comprehension and/or honesty issues

            It always says some variation of “in order to simplify, you must…”?

            Which part of the word “must” don’t you understand? 😂 Also, which part of simplifying Brackets is part of the order of operations don’t you understand? 😂

            No, you don’t notice, because you’re blind

            cough cough 😂 Here’s another one, in case you’re still in any doubt…

            don’t understand what distributivity actually is.

            says the person who actually doesn’t understand what The Distributive Law is

            You also got me confused with someone else trying to explain in short words how you’re wrong

            Nope. Tweedle Dum and Tweedle Dee say very similar things, but one can still tell them apart.

            bye

            Don’t let the door hit you on the way out! 😂

            • FishFace@piefed.social
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              2 days ago

              I don’t know which comment you’re replying to but I’m pretty sure you already replied to it, because in every comment chain I remember I had written it up with a very simple explanation of what you needed to do if you wanted to continue the discussion.

              I’ve read plenty of your nonsense by now and told you explicitly why I’m not reading more; don’t get all weepy when I follow through.

              • I’m pretty sure you already replied to it

                Yep, and you admitted to not reading it 🙄

                what you needed to do if you wanted to continue the discussion

                And when I had, in your next comment you posted, you admitted you didn’t read it 🙄 I even posted the screenshot of you saying that

                I’ve read plenty of your nonsense by now

                but admitted to not reading the proof that you were wrong 🙄

                told you explicitly why I’m not reading more

                What you said: too long

                What you meant: not reading anything which proves I’m wrong

                don’t get all weepy when I follow through.

                says person who admitted to not following through 🤣🤣🤣

                • FishFace@piefed.social
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                  2 days ago

                  You’re still not doing any of the very simple things to demonstrate that it’s worth having a discussion with you. Feel free to start, then I can get back to reading fully. Yes, you need to do them in a short comment. That won’t be a problem if you actually wanted to do it. Bye!

                  • You’re still not doing any of the very simple things to demonstrate that it’s worth having a discussion with you

                    says person still not reading the posts where I did 🙄

                    Feel free to start

                    Been doing it the whole time dude. You’re the one ignoring the textbooks that prove you are wrong 🙄

                    then I can get back to reading fully

                    There’s nothing stopping you doing that now

                    Yes, you need to do them in a short comment.

                    So don’t post so much BS in the first place and it won’t turn into a long reply 🙄

                    Ok, here’s something short for you, you said…

                    Where in your textbook does it say explicitly that ab is not a multiplication, or that a multiplication is different from a product in any substantive sense, eh?

                    Ok, so yet again you have ignored my repeated please to you to read more, but you have again refused, so this emabrassment is of your own making…

                    Page 23, a÷bxc=axc÷b…

                    Page 282, answers on Page 577, a÷b(c+d) is a over b(c+d), and not ax(c+d) over b 🙄

                    You going to reply now? Or just gonna ignore it as usual?

                    provide an actual textbook example where any of the disputed claims you make are explicitly made

                    It’s in the actual textbook I already gave you, and you refused to read more than 2 sentences out of it 🙄

                    Where’s your textbook which says “ab is a product, not multiplication”?

                    Same textbook. See previous point.

                    there is a textbook reference saying “ab means the same as a × b

                    Yep, and does not say that they are equal, for reasons they are not equal,see above, from the very same textbook you kept lying about what it said 🙄

                    so your mental contortions are not more authoritative

                    I’ve just proven it was you who was making the mental contortions, as I have been telling you all along

                    your ability to interpret maths textbooks is poor

                    says person who claimed that “means” means “equals”, in contradiction of the whole rest of the textbook 🙄

                    My prediction: you’ll present some implicit references

                    And just like everything else, you were wrong about that too, 🙄 but “oh no! too long! I’m not going to read that”

                    And here you are admitting to someone else what I have been telling you the whole time 🙄

                    While reading some of his linked textbooks I found examples which define the solidus as operating on everything in the next term, which would have 1/ab = 1/(ab) = 1/(ab) = 1/ab

                    This is also how we were taught though as I recall it was not taught systematically

                    Yes it is, literally every textbook, not just Maths, but Physics, Engineering, etc. and it’s referenced in Cajori in 1928, they all use ab=(axb).

                    remember one teacher when I was about 17 complaining that people in her class were writing 1/a·b but should have been writing (1/a)·b

                    because (1/a) is 1 Term, a fraction, but 1/a is 2 Terms, 1 divided by a.

                    if you have a correct understanding of what the order of operations really are

                    rules

                    you can understand that these conventions all become a bit unwieldy when you have a very complex formula

                    not to anyone who knows all the rules 🙄

                    (ab)/(bc) not ((ab)/b)c (which is what the strict interpretation of PEMDAS

                    No it isn’t. ab=(axb), so ab/cd=(axb)/(cxd), (axb) done in the P step, (cxd) done in the P step, then you do the division - it’s not complicated! 😂 Literally every textbook in all subjects does it that way. That is the strict interpretation of PEMDAS 🙄

                    because “bc” just visually creates a single thing

                    a TERM. Come on, you can say it. 😂

                    even though bc(x-1)(y-1)·sin(b) is a single term

                    Nope! It’s 2 Terms 🙄

                    Because DumbMan doesn’t understand mathematical convention

                    So, I just call you DumbMan from now on? Got it! 😂

                    looks like he’s gone to sleep again now

                    It’s called having a life. So sorry to hear you don’t have one

                    That won’t be a problem if you actually wanted to do it

                    I actually did it and you confessed to not reading it

                    Bye!

                    I’ll take that as an admission of being wrong then., Don’t let the door hit you on the way out.