oxedyne/fe2o3 — fe2o3_austenite/samples/keystone.typ

1.2 KiB, 1 run

created by r1870400018:38441, which is this file's identity for as long as the history lasts, whatever it is later renamed to

1	= The Long Life of Paper
2
3	Paper is so ordinary that we rarely stop to consider it, and yet it is one of
4	the most consequential inventions in the whole history of communication. It is
5	cheap, light, foldable, and extraordinarily durable when it is made well; a
6	sheet manufactured a thousand years ago can still be read today, while the
7	magnetic and optical media of the last century have already grown unreadable.
8	The story of how a mat of macerated plant fibre came to carry almost everything
9	humanity chose to remember is a story of _patient craftsmanship_, of secrets kept
10	and secrets stolen, and of a technology so successful that it became invisible.
11
12	The partial sums of the first natural numbers close into a tidy form:
13
14	$ sum_(i=1)^n i = frac(n (n+1), 2) $
15
16	which the flow below decides before it ends:
17
18	#figure(
19	align(center, [#diagram(
20	spacing: 1.5em, node-stroke: 1pt,
21	node((0,2), [Start], fill: colours.light, shape: shapes.hexagon),
22	edge("-\|>"),
23	node((0,4), align(center)[Decide?], fill: blue.lighten(50%), shape: diamond, width: 6em, height: 3.25em),
24	edge("r,r,u,u,l,l", "-\|>", [N]),
25	edge("-\|>", [Y]),
26	node((0,6), [End]),
27	)]),
28	caption: [A small decision flow.],
29	)