Meaning of $lambda$ on convex fnction definition











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What is the meaning (pratical/visual example) and significance of $lambda$ on the definition of a convex function and why is it set on $[0,1]$?










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    What is the meaning (pratical/visual example) and significance of $lambda$ on the definition of a convex function and why is it set on $[0,1]$?










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      What is the meaning (pratical/visual example) and significance of $lambda$ on the definition of a convex function and why is it set on $[0,1]$?










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      What is the meaning (pratical/visual example) and significance of $lambda$ on the definition of a convex function and why is it set on $[0,1]$?







      convex-optimization






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      asked Nov 12 at 16:24









      mgani

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          It parameterizes the line segment between two points. For example, part of the definition is $lambda x_1 + (1-lambda)x_2$. For $lambda=1$ this is $x_1$, while for $lambda=0$ this is $x_2$. For $lambda=0.5$ you get the midpoint.






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            1 Answer
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            It parameterizes the line segment between two points. For example, part of the definition is $lambda x_1 + (1-lambda)x_2$. For $lambda=1$ this is $x_1$, while for $lambda=0$ this is $x_2$. For $lambda=0.5$ you get the midpoint.






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              up vote
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              accepted










              It parameterizes the line segment between two points. For example, part of the definition is $lambda x_1 + (1-lambda)x_2$. For $lambda=1$ this is $x_1$, while for $lambda=0$ this is $x_2$. For $lambda=0.5$ you get the midpoint.






              share|cite|improve this answer























                up vote
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                accepted







                up vote
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                down vote



                accepted






                It parameterizes the line segment between two points. For example, part of the definition is $lambda x_1 + (1-lambda)x_2$. For $lambda=1$ this is $x_1$, while for $lambda=0$ this is $x_2$. For $lambda=0.5$ you get the midpoint.






                share|cite|improve this answer












                It parameterizes the line segment between two points. For example, part of the definition is $lambda x_1 + (1-lambda)x_2$. For $lambda=1$ this is $x_1$, while for $lambda=0$ this is $x_2$. For $lambda=0.5$ you get the midpoint.







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                answered Nov 12 at 16:39









                LinAlg

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