How to define the order of approximation in ODE?












0












$begingroup$


How to define the order of the left part of this equation?
$$
frac{y_{i+1}-y_i}{Delta x}
=frac12left(f(x_i,y_i,y_i')+f(x_{i+1},y_{i+1},y_{i+1}')right)
$$










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$endgroup$












  • $begingroup$
    What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
    $endgroup$
    – LutzL
    Dec 21 '18 at 12:29
















0












$begingroup$


How to define the order of the left part of this equation?
$$
frac{y_{i+1}-y_i}{Delta x}
=frac12left(f(x_i,y_i,y_i')+f(x_{i+1},y_{i+1},y_{i+1}')right)
$$










share|cite|improve this question











$endgroup$












  • $begingroup$
    What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
    $endgroup$
    – LutzL
    Dec 21 '18 at 12:29














0












0








0





$begingroup$


How to define the order of the left part of this equation?
$$
frac{y_{i+1}-y_i}{Delta x}
=frac12left(f(x_i,y_i,y_i')+f(x_{i+1},y_{i+1},y_{i+1}')right)
$$










share|cite|improve this question











$endgroup$




How to define the order of the left part of this equation?
$$
frac{y_{i+1}-y_i}{Delta x}
=frac12left(f(x_i,y_i,y_i')+f(x_{i+1},y_{i+1},y_{i+1}')right)
$$







ordinary-differential-equations approximation






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share|cite|improve this question













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share|cite|improve this question








edited Dec 21 '18 at 12:28









LutzL

58.7k42055




58.7k42055










asked Dec 21 '18 at 11:14









Полина ГамаюноваПолина Гамаюнова

12




12












  • $begingroup$
    What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
    $endgroup$
    – LutzL
    Dec 21 '18 at 12:29


















  • $begingroup$
    What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
    $endgroup$
    – LutzL
    Dec 21 '18 at 12:29
















$begingroup$
What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
$endgroup$
– LutzL
Dec 21 '18 at 12:29




$begingroup$
What exactly is $y_i'$ in this situation? Do you solve $y'=f(x,y,y')$? Or $y''=f(x,y,y')$?
$endgroup$
– LutzL
Dec 21 '18 at 12:29










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