Pith Number

pith:POFLHFUB

pith:2019:POFLHFUBNVFVEDI6CJTFGDSXWU

not attested not anchored not stored refs pending

The foundations of spectral computations via the Solvability Complexity Index hierarchy

Anders C. Hansen, Matthew J. Colbrook

arxiv:1908.09592 v4 · 2019-08-26 · math.SP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{POFLHFUBNVFVEDI6CJTFGDSXWU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

On the computation of geometric features of spectra of linear operators on Hilbert spaces

Receipt and verification

First computed	2026-07-05T04:58:13.452842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b8ab396816d4b520d1e1266530e57b510fe7b1dab4b5b8ecad52948f5f31b65

Aliases

arxiv: 1908.09592 · arxiv_version: 1908.09592v4 · doi: 10.48550/arxiv.1908.09592 · pith_short_12: POFLHFUBNVFV · pith_short_16: POFLHFUBNVFVEDI6 · pith_short_8: POFLHFUB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/POFLHFUBNVFVEDI6CJTFGDSXWU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7b8ab396816d4b520d1e1266530e57b510fe7b1dab4b5b8ecad52948f5f31b65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7da3931a0c9d7833f8aefe881176df8db26ddccc835612f0044b109e9857ca54",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SP",
    "submitted_at": "2019-08-26T11:02:34Z",
    "title_canon_sha256": "bfc0a28aeeda8a7e1bbf0b6b7c45deec53a644b69268ca16f25f6b85ca2105f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09592",
    "kind": "arxiv",
    "version": 4
  }
}