They made it clear to the former Nigerian military ruler that a return to constitutional order is a pre-condition for direct talks with President Mamadou Tandja.

VOA: standard.2009.11.14

Okay, good, so what we're going to do is we're going to differentiate this thing to find a first order condition.

好吧,那我们接下来,对它求导后找出一阶条件

耶鲁公开课 - 博弈论课程节选

So if we differentiate this object, I'm gonna find a first order condition in a second.

想要求它的导数,先让我想想一阶条件

耶鲁公开课 - 博弈论课程节选

The second-order condition involves the security of the agent.

FORBES: Written by David Lowenstein and Risu Na

The establishment of any solution capable of meeting the aforementioned first-order condition would likely result in enough success that the security product itself would become the subject of material direct attack, including by state actors.

FORBES: Written by David Lowenstein and Risu Na

The council and other local authorities won a judicial review of the decision, forcing the government to order a condition survey of the nine Sandwell schools.

BBC: Sandwell Council in talks over schools' old buildings