Editing 1491: Stories of the Past and Future

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Taking the "years in the past" on the y-axis to be read as negatives like in most graphs one can write
 
Taking the "years in the past" on the y-axis to be read as negatives like in most graphs one can write
* Dates on the lower line satisfy the equation y = x-2015. Corresponding works were published in the year x = 2015+y and are set in the year x+y = 2015+2y.
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* Dates on the lower line satisfy: y = x-2015. Corresponding works were published in the year x = 2015+y and are set in the year x+y = 2015+2y.
* Dates on the upper line satisfy the equation y = 2015-x. Corresponding works were published in the year x = 2015-y and are set in the year x+y = 2015.
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* Dates on the upper line satisfy: y = 2015-x. Corresponding works were published in the year x = 2015-y and are set in the year x+y = 2015.
 
Thus it's clear that the definitions of the lines are consistent with each other as they follow similar but inverted functions.
 
Thus it's clear that the definitions of the lines are consistent with each other as they follow similar but inverted functions.
 
The graph uses variable {{w|logarithmic scale}}s, adjusting the scale in various regions to the temporal density of works being plotted. If the scale were linear, the graph would in fact represent a (bidimensional) {{w|Minkowski diagram}}, which depicts the moving cones of past and future in spacetime as one's present advances in time.
 
The graph uses variable {{w|logarithmic scale}}s, adjusting the scale in various regions to the temporal density of works being plotted. If the scale were linear, the graph would in fact represent a (bidimensional) {{w|Minkowski diagram}}, which depicts the moving cones of past and future in spacetime as one's present advances in time.

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