The largest rank in each partition, and what refusing to compress a touching pair costs
At its defaults it draws the largest rank in each partition, and what refusing to compress a touching pair costs. The strong rule's worst block is rank 5 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 9, 10, 12, 13, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 67,968 numbers against 61,440 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
partition-ranks is one function in lib/figures/hodlr.js —
the partition — a rule that reads four numbers a pair and no entry of the matrix. Everything below came out of it during this build, at
arguments taken from the essays rather than invented for this page. A figure here is the
figure a reader meets in an essay, and if the generator changes, this page changes with it.
At its defaults
Drawn even though every essay passes arguments — which on this site is every essay, at 100% of placements since the standard pass. A default nothing exercises is a trap for the next essay to call this with none, and this is the page where a default that has drifted from the figures around it becomes visible.
The strong rule's worst block is rank 5 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 9, 10, 12, 13, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 67,968 numbers against 61,440 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
logEps: -8
The arguments are the ones The test that costs what it saves passes. A value nobody placed would be a picture no essay asked for and no claim was ever checked against.
The strong rule's worst block is rank 5 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 9, 10, 12, 13, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 67,968 numbers against 61,440 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
logEps: -12
The arguments are the ones The test that costs what it saves passes. A value nobody placed would be a picture no essay asked for and no claim was ever checked against.
The strong rule's worst block is rank 7 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 12, 14, 16, 18, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 86,784 numbers against 79,872 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
logEps: -6
The arguments are the ones The test that costs what it saves passes. A value nobody placed would be a picture no essay asked for and no claim was ever checked against.
The strong rule's worst block is rank 4 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 7, 8, 9, 10, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 58,560 numbers against 49,152 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
logEps: -4
The arguments are the ones The test that costs what it saves passes. A value nobody placed would be a picture no essay asked for and no claim was ever checked against.
The strong rule's worst block is rank 3 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 5, 6, 7, 7, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 49,152 numbers against 38,912 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
logEps: -2
The arguments are the ones The test that costs what it saves passes. A value nobody placed would be a picture no essay asked for and no claim was ever checked against.
The strong rule's worst block is rank 2 at every size — one number across a factor of eight — because it never compresses a pair of clusters that touch. The weak rule compresses them and its worst rank climbs 3, 3, 4, 4, at about one per doubling, which is the touching block's logarithm arriving inside a whole partition. That is what the test buys. What it costs is on the badge: at every size measured, the finer partition stores MORE — 39,744 numbers against 25,600 at n = 512 — because it pays in blocks what it saves in rank, and the blocks near the diagonal are dense. The bounded rank is an asymptotic argument and the sizes here are not asymptotic.
What it checked while drawing
Every figure above checked its own claims on the way to being drawn, and a claim that failed
would have stopped the picture rather than shipped a wrong one. Those checks used to leave
no trace at all: a passing one returned true and the only evidence the figure had
checked anything was that nothing crashed. The list below is what they actually said, collected
by running this generator with an observer installed — not a description of
what it is believed to check.
16 distinct claims across 6 sets of arguments, grouped below by shape — because most of them are one sentence with a different number in it, and how many separate times that sentence was put to the test is the informative part.
and the strong rule never stores less at n = 64, which is the half nobody expects — checked 4 times
a kernel this file defines
a partition rule this file defines
a power of two, so the bisection is exact at every level
a shift inside the range the matrix stays positive definite and the geometry stays the geometry
a size the dense reference below is affordable at
an accuracy the blocks have singular values across
an accuracy, not a rank
an admissibility constant inside the range the expansion converges over
and strictly more at the largest size, where the partitions have room to differ
and the weak rule's climbs, because it compresses the touching halves
matmul shapes agree
the strong rule's worst rank is one number across the sweep
Against the rule
It draws a decomposition and prints its residual. It calls
storageAgainstSize,
and every figure above carries the badge — which residualcheck verifies by looking
for it in the emitted SVG rather than by finding the call that builds one. A badge that is
constructed and then left out of the body is the failure that check exists for.
Across the library: the rule bites on 217
of 397 generators —
199 print a residual and
18 are exempt with a published reason;
180 factorise nothing.
Read from lib/residual-rule.js, which is the same body the gate enforces from,
and the gate's last check fails the build if this page and it disagree about any generator.
Where it is called
Changing this generator changes every figure on this list. That is what makes the list worth publishing rather than keeping in a check script.