Pith Number

pith:QR27NTKJ

pith:2017:QR27NTKJJVL2KD5XFSMTORWHMB

not attested not anchored not stored refs pending

A classification for wave models with time-dependent mass and speed of propagation

Marcelo Rempel Ebert, Wanderley Nunes do Nascimento

arxiv:1710.01212 v1 · 2017-10-03 · 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{QR27NTKJJVL2KD5XFSMTORWHMB}

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	2026-05-18T00:33:44.938445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8475f6cd494d57a50fb72c993746c76054b77a5ecee30d4b1d1e0ebe78070d75

Aliases

arxiv: 1710.01212 · arxiv_version: 1710.01212v1 · doi: 10.48550/arxiv.1710.01212 · pith_short_12: QR27NTKJJVL2 · pith_short_16: QR27NTKJJVL2KD5X · pith_short_8: QR27NTKJ

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/QR27NTKJJVL2KD5XFSMTORWHMB \
  | 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: 8475f6cd494d57a50fb72c993746c76054b77a5ecee30d4b1d1e0ebe78070d75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d4f3762d0095f5a9ae2e1632af26bf06377570282ad374c889830bc35aca7fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-10-03T15:23:34Z",
    "title_canon_sha256": "2c9ad455af181bfee12e30a39e229b62ab66cdee9bab75e48b11d6dceed108f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.01212",
    "kind": "arxiv",
    "version": 1
  }
}