Thin spaces in set-builder notation












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Knuth recommends inserting thin spaces inside the braces in set-builder notation. I do not quite get the point in doing so. Why would one write {a,b,c} but on the other hand {,xmid x>5,}? Is this style well-regarded?



How am I supposed to typeset conditional probabilities using mid, then? P(X>5mid1<X<6) or P(,X>5mid1<X<6,)? P(Amid B) or P(,Amid B,)?



Any help appreciated!






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    1














    Knuth recommends inserting thin spaces inside the braces in set-builder notation. I do not quite get the point in doing so. Why would one write {a,b,c} but on the other hand {,xmid x>5,}? Is this style well-regarded?



    How am I supposed to typeset conditional probabilities using mid, then? P(X>5mid1<X<6) or P(,X>5mid1<X<6,)? P(Amid B) or P(,Amid B,)?



    Any help appreciated!






    typography







    share|improve this question

























      1












      1








      1


      1





      Knuth recommends inserting thin spaces inside the braces in set-builder notation. I do not quite get the point in doing so. Why would one write {a,b,c} but on the other hand {,xmid x>5,}? Is this style well-regarded?



      How am I supposed to typeset conditional probabilities using mid, then? P(X>5mid1<X<6) or P(,X>5mid1<X<6,)? P(Amid B) or P(,Amid B,)?



      Any help appreciated!






      typography







      share|improve this question













      Knuth recommends inserting thin spaces inside the braces in set-builder notation. I do not quite get the point in doing so. Why would one write {a,b,c} but on the other hand {,xmid x>5,}? Is this style well-regarded?



      How am I supposed to typeset conditional probabilities using mid, then? P(X>5mid1<X<6) or P(,X>5mid1<X<6,)? P(Amid B) or P(,Amid B,)?



      Any help appreciated!






      typography




      typography






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 14 mins ago









      Ivan

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