What are “complementary pair-wise comparable functions”?











up vote
1
down vote

favorite












I got this term while studying periodic functions; my book writes:




If $f_1(x)$ & $f_2(x)$ are periodic functions with periods $T_1$ & $T_2$ respectively, then we have $h(x) = f_1(x) + f_2(x)$ has period, as $dfrac{1}{2} text{L.C.M. of }; {T_1 ,T_2}$, if $f_1(x)$ & $f_2(x)$ are complementary pair-wise comparable functions.




Don't know how the author deduced the rule. But my main question is what do this "complementary, pair-wise, comparable function" mean? I've googled this but it was in vain.










share|cite|improve this question


























    up vote
    1
    down vote

    favorite












    I got this term while studying periodic functions; my book writes:




    If $f_1(x)$ & $f_2(x)$ are periodic functions with periods $T_1$ & $T_2$ respectively, then we have $h(x) = f_1(x) + f_2(x)$ has period, as $dfrac{1}{2} text{L.C.M. of }; {T_1 ,T_2}$, if $f_1(x)$ & $f_2(x)$ are complementary pair-wise comparable functions.




    Don't know how the author deduced the rule. But my main question is what do this "complementary, pair-wise, comparable function" mean? I've googled this but it was in vain.










    share|cite|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I got this term while studying periodic functions; my book writes:




      If $f_1(x)$ & $f_2(x)$ are periodic functions with periods $T_1$ & $T_2$ respectively, then we have $h(x) = f_1(x) + f_2(x)$ has period, as $dfrac{1}{2} text{L.C.M. of }; {T_1 ,T_2}$, if $f_1(x)$ & $f_2(x)$ are complementary pair-wise comparable functions.




      Don't know how the author deduced the rule. But my main question is what do this "complementary, pair-wise, comparable function" mean? I've googled this but it was in vain.










      share|cite|improve this question













      I got this term while studying periodic functions; my book writes:




      If $f_1(x)$ & $f_2(x)$ are periodic functions with periods $T_1$ & $T_2$ respectively, then we have $h(x) = f_1(x) + f_2(x)$ has period, as $dfrac{1}{2} text{L.C.M. of }; {T_1 ,T_2}$, if $f_1(x)$ & $f_2(x)$ are complementary pair-wise comparable functions.




      Don't know how the author deduced the rule. But my main question is what do this "complementary, pair-wise, comparable function" mean? I've googled this but it was in vain.







      functions






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Sep 6 '15 at 18:07







      user142971





























          2 Answers
          2






          active

          oldest

          votes

















          up vote
          0
          down vote













          I think it means if you put $(π/2-x)$ in place of $x$ in one of the functions and get the second function, then they are called complementary. Like $sin(x)$ and $cos(x)$.






          share|cite|improve this answer






























            up vote
            -2
            down vote













            Consider a set of functions $F$.



            The set is pairwise comparable if, for any two functions $f(x)$ and $g(x)$ within the set $F$, we know that either:



            $f(x) ge g(x)$ for any value of $x$, or
            $f(x) le g(x)$ for any value of $x$.






            share|cite|improve this answer























            • and what does it mean when you put "complementary" in there?
              – GEdgar
              Mar 26 '16 at 18:55










            • This interpretation doesn't seem to make much sense in the context of the question.
              – Eric Wofsey
              Mar 26 '16 at 19:27











            Your Answer





            StackExchange.ifUsing("editor", function () {
            return StackExchange.using("mathjaxEditing", function () {
            StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
            StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
            });
            });
            }, "mathjax-editing");

            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "69"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            noCode: true, onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














             

            draft saved


            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f1424456%2fwhat-are-complementary-pair-wise-comparable-functions%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown
























            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote













            I think it means if you put $(π/2-x)$ in place of $x$ in one of the functions and get the second function, then they are called complementary. Like $sin(x)$ and $cos(x)$.






            share|cite|improve this answer



























              up vote
              0
              down vote













              I think it means if you put $(π/2-x)$ in place of $x$ in one of the functions and get the second function, then they are called complementary. Like $sin(x)$ and $cos(x)$.






              share|cite|improve this answer

























                up vote
                0
                down vote










                up vote
                0
                down vote









                I think it means if you put $(π/2-x)$ in place of $x$ in one of the functions and get the second function, then they are called complementary. Like $sin(x)$ and $cos(x)$.






                share|cite|improve this answer














                I think it means if you put $(π/2-x)$ in place of $x$ in one of the functions and get the second function, then they are called complementary. Like $sin(x)$ and $cos(x)$.







                share|cite|improve this answer














                share|cite|improve this answer



                share|cite|improve this answer








                edited Apr 15 at 12:53









                Tyrone

                4,06011125




                4,06011125










                answered Apr 15 at 12:35









                Swastik

                1




                1






















                    up vote
                    -2
                    down vote













                    Consider a set of functions $F$.



                    The set is pairwise comparable if, for any two functions $f(x)$ and $g(x)$ within the set $F$, we know that either:



                    $f(x) ge g(x)$ for any value of $x$, or
                    $f(x) le g(x)$ for any value of $x$.






                    share|cite|improve this answer























                    • and what does it mean when you put "complementary" in there?
                      – GEdgar
                      Mar 26 '16 at 18:55










                    • This interpretation doesn't seem to make much sense in the context of the question.
                      – Eric Wofsey
                      Mar 26 '16 at 19:27















                    up vote
                    -2
                    down vote













                    Consider a set of functions $F$.



                    The set is pairwise comparable if, for any two functions $f(x)$ and $g(x)$ within the set $F$, we know that either:



                    $f(x) ge g(x)$ for any value of $x$, or
                    $f(x) le g(x)$ for any value of $x$.






                    share|cite|improve this answer























                    • and what does it mean when you put "complementary" in there?
                      – GEdgar
                      Mar 26 '16 at 18:55










                    • This interpretation doesn't seem to make much sense in the context of the question.
                      – Eric Wofsey
                      Mar 26 '16 at 19:27













                    up vote
                    -2
                    down vote










                    up vote
                    -2
                    down vote









                    Consider a set of functions $F$.



                    The set is pairwise comparable if, for any two functions $f(x)$ and $g(x)$ within the set $F$, we know that either:



                    $f(x) ge g(x)$ for any value of $x$, or
                    $f(x) le g(x)$ for any value of $x$.






                    share|cite|improve this answer














                    Consider a set of functions $F$.



                    The set is pairwise comparable if, for any two functions $f(x)$ and $g(x)$ within the set $F$, we know that either:



                    $f(x) ge g(x)$ for any value of $x$, or
                    $f(x) le g(x)$ for any value of $x$.







                    share|cite|improve this answer














                    share|cite|improve this answer



                    share|cite|improve this answer








                    edited Mar 26 '16 at 18:56







                    user249332

















                    answered Mar 26 '16 at 18:52









                    Navneet

                    1




                    1












                    • and what does it mean when you put "complementary" in there?
                      – GEdgar
                      Mar 26 '16 at 18:55










                    • This interpretation doesn't seem to make much sense in the context of the question.
                      – Eric Wofsey
                      Mar 26 '16 at 19:27


















                    • and what does it mean when you put "complementary" in there?
                      – GEdgar
                      Mar 26 '16 at 18:55










                    • This interpretation doesn't seem to make much sense in the context of the question.
                      – Eric Wofsey
                      Mar 26 '16 at 19:27
















                    and what does it mean when you put "complementary" in there?
                    – GEdgar
                    Mar 26 '16 at 18:55




                    and what does it mean when you put "complementary" in there?
                    – GEdgar
                    Mar 26 '16 at 18:55












                    This interpretation doesn't seem to make much sense in the context of the question.
                    – Eric Wofsey
                    Mar 26 '16 at 19:27




                    This interpretation doesn't seem to make much sense in the context of the question.
                    – Eric Wofsey
                    Mar 26 '16 at 19:27


















                     

                    draft saved


                    draft discarded



















































                     


                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f1424456%2fwhat-are-complementary-pair-wise-comparable-functions%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    Popular posts from this blog

                    Willebadessen

                    Ida-Boy-Ed-Garten

                    Residenzschloss Arolsen