Pith Number

pith:2R4LBTVU

pith:2010:2R4LBTVUPJ4NWSH6IOFPDJTXQU

not attested not anchored not stored refs pending

The hanging thin rod: A singularly perturbed eigenvalue problem

David G. Schaeffer, Yossi Farjoun

arxiv:1008.1912 v1 · 2010-08-11 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2R4LBTVUPJ4NWSH6IOFPDJTXQU}

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.

Receipt and verification

First computed	2026-05-18T04:42:22.740842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d478b0ceb47a78db48fe438af1a67785333c3e6329a48af5486540cb6ad07526

Aliases

arxiv: 1008.1912 · arxiv_version: 1008.1912v1 · doi: 10.48550/arxiv.1008.1912 · pith_short_12: 2R4LBTVUPJ4N · pith_short_16: 2R4LBTVUPJ4NWSH6 · pith_short_8: 2R4LBTVU

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/2R4LBTVUPJ4NWSH6IOFPDJTXQU \
  | 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: d478b0ceb47a78db48fe438af1a67785333c3e6329a48af5486540cb6ad07526

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40614aab84484c64ff8697fac1e4fffd02dda8e4b8542cadc778df15aeec441c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2010-08-11T14:15:17Z",
    "title_canon_sha256": "aabc6d1c7e0b8e94f0d9e38b616b723cbb5befee44f544ef0b2f15d2f6758579"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.1912",
    "kind": "arxiv",
    "version": 1
  }
}