Pith Number

pith:YYFELDIJ

pith:2014:YYFELDIJMU6JY5BLLK2WVMMNWT

not attested not anchored not stored refs pending

The spectral drop problem

Bozhidar Velichkov, Giuseppe Buttazzo

arxiv:1406.1627 v1 · 2014-06-06 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YYFELDIJMU6JY5BLLK2WVMMNWT}

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	2026-05-18T02:50:22.012812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c60a458d09653c9c742b5ab56ab18db4ce3ae56964f9459c7b01b428bfde617d

Aliases

arxiv: 1406.1627 · arxiv_version: 1406.1627v1 · doi: 10.48550/arxiv.1406.1627 · pith_short_12: YYFELDIJMU6J · pith_short_16: YYFELDIJMU6JY5BL · pith_short_8: YYFELDIJ

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/YYFELDIJMU6JY5BLLK2WVMMNWT \
  | 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: c60a458d09653c9c742b5ab56ab18db4ce3ae56964f9459c7b01b428bfde617d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d0d958c2906ac71ed6d5c2cbf3e51c151a059c48e269bc1c1ad01249fba9d46",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2014-06-06T10:08:56Z",
    "title_canon_sha256": "558ffb960b5408936c4a2b9f81c592414106dd4b1290862ebc5b0991741b05c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.1627",
    "kind": "arxiv",
    "version": 1
  }
}