challenge ⪢⪢
http://qindex.info/i.php?x=13817
 challenge ⪢⪢
http://qindex.info/i.php?x=13818
 Cuba's Geographic Challenge
http://qindex.info/i.php?x=4027
 01 The Greeks, Newton and Leibniz
○ Many students quit math entirely when they get up to this point, mainly out of fear. ○ We will get to some of those in due time as well. ○ What challenge could possibly have necessitated the development of calculus?
http://qindex.info/i.php?x=5032
○○○ 1962-10-25 ⪢⪢
On October 25th, the blockade was challenged for the first time. Soviet ships approached the quarantine zone but American ships held their ground. The Soviet vessels were forced to turn back and the blockade continued. → hold one's ground
http://qindex.info/i.php?x=20292
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