Math And Arithmetic
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pi and the square root of two are mathematical constants. They are not functions of time and so cannot be plotted on a timeline!
"B.C.E." stands for "before our common era." It is often used instead of "B.C." which means "before Christ." Many prefer to use"B.C.E." instead of the term "B.C." The reason is that there is a variance in the historical timeline and the actual arrival of the Christ. Since there is no year "zero" and there are not two years in a row on the timeline listed as "year one, in other words, there is not a 1 BCE followed by a 1 CE, Jesus would have been born in the year 2 BCE, according to the timeline, in order for the calender to reflect his years on earth from that year forward. Many feel that it is a contradiction to use the term "before Christ" because of this. "A.D." means "Anno Domini" which means "in the year of our Lord." Jesus was annointed with holy spirit and became the Messiah or Christ when he was baptised in the Jordan River in the year 29 CE. So the term "A.D." would not be completely appropriate until then, thus for the sake of accuracy, the terms "B.C.E." and "C.E." are preferred by many over the terms "B.C. and A.D."
The way to look at positive and negative numbers is to imagine them as if they are on a numberline. Positives will go up the timeline, and towards 100. Negatives will go down (to the left) of the timeline.
A sequence can be referred to as a string, a progression, a chain or a timeline.