La catastrophe du barrage de Malpasset à l'épreuve des facteurs organisationnel et humain

In the recreational number theory, a narcissistic number is a number that is the sum of its own digits each raised to the power of the number of digits.. Adapted from Algebra II

• Paper, represented by an open hand, with the fingers extended and touching, in order to represent a sheet of paper.. The objective is to select a gesture which

When she was fifteen, her father began to regularly gather in his house a circle of the most learned men in Bologna, before whom she read and maintained

Napier set out to nd methods to compute the logarithm of a real number, and experimented with some half a dozen before hitting one that was as quick as it was accurate. To

The computer performs the subtraction of one number from another by changing the number subtracted into its complement and adding.. In binary, the complement of a byte is given by

The puzzle involves a visitor to the island who meets small groups of inhabitants.. Usually the aim is for the visitor to deduce the inhabitants' type from

Draw a trigonometric circle to show that the cosine function is even and that the sine function is odd.. Prove that any polynomial function of x that contains only even powers of x

The values of x corresponding to assigned values of y always occur in pairs equal in mag- nitude 1 and opposite in sign, since the equation only contains even powers of x; therefore