Leave maths aside and concentrate upon observing what people do to make a profit.

FORBES: Sometimes Science is Behind the Curve

Apparently these generals were not, like their prime minister, devoted to Napoleon's maxim, "Frappez la masse, et le reste vient par surcroit , " which, vis-a-vis strategic or other problems, bids one to concentrate upon the essence, with assurance that all else will follow in train, even bits of string.

CENTERFORSECURITYPOLICY: Center For Security Policy

If, to paraphrase Carl von Clausewitz, diplomacy is war by other means, then just as armies are called upon to concentrate their efforts and resources where they can do the most good for their cause, so governments must utilize their diplomatic resources - whether plentiful or scarce - to advance their most important national interests.

CENTERFORSECURITYPOLICY: Waging diplomatic war

But it also depends upon the ability of European companies to carry through pledges to concentrate on building shareholder value.

ECONOMIST: Will Europe catch a cold?