Correction (3e expression, 2e terme) : « Y d s − d . ( U + a ) d x d s {\displaystyle Y\operatorname {d} s-\operatorname {d} .(U+a){\frac {\operatorname {d} x}{\operatorname {d} s}}} » → « Y d s − d . ( U + a ) d y d s {\displaystyle Y\operatorname {d} s-\operatorname {d} .(U+a){\frac {\operatorname {d} y}{\operatorname {d} s}}} » (coquille)
