DLMF:1.5.E20 (Q143)

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DLMF:1.5.E20
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    Statements

    Defining formula
    ∂ 2 ⁡ f ∂ ⁡ x 2 > 0 ⁢ ( < 0 )    at  ( a , b ) , partial-derivative 𝑓 𝑥 2 0 absent 0  at  ( a , b ) , {\displaystyle{\displaystyle\frac{{\partial}^{2}f}{{\partial x}^{2}}>0\;\;\;% \mbox{$(<0)$}\quad\mbox{ at $(a,b)$,}}}
    0 references
    DLMF id
    DLMF:1.5.E20
    0 references
    Symbols used
    Q10777
    Defining formula
    ( a , b ) 𝑎 𝑏 {\displaystyle{\displaystyle(\NVar{a},\NVar{b})}}
    xml-id
    introduction.Sx4.p1.t1.r29.m6abdec
    0 references
     
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