“Minister opening” in Chinese chess implies the balance between the offense and the defense in the case of playing chess. ( )
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The straggler said: I am getting closer and closer to the army. Here the distance between the soldier and the army refers to the distance between the soldier and the furthest person in the army. ( )
Continuous functions can’t be approximated by discontinuous function sequences. ( )
A functional is a more extensive mapping relationship, which can be understood as the function of the function -- its dependent variable is a function. ( )
The functional extremum problem can be solved by perturbing a family of curves around the extremum curve, and the functional extremum problem can be transformed into a common function extremum problem to be solved. ( )