Centuries: 16th century - 17th century - 18th century
Decades: 1590s 1600s 1610s 1620s 1630s - 1640s - 1650s 1660s 1670s 1680s 1690s
Years: 1642 1643 1644 1645 1646 - 1647 - 1648 1649 1650 1651 1652
Events of the English Civil War
... in the value of that variable. Usually, an upper case delta (e.g. Δx) is used for large or macroscopic changes, and a lower case delta (e.g. δx) is for ...
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