Pith Number

pith:2OUEQXT2

pith:2015:2OUEQXT27KI3H2GK4YZXLVGSJM

not attested not anchored not stored refs pending

Fast estimation from above of the maximum wave speed in the Riemann problem for the Euler equations

Bojan Popov, Jean-Luc Guermond

arxiv:1511.02756 v2 · 2015-11-09 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2OUEQXT27KI3H2GK4YZXLVGSJM}

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	2026-05-18T01:10:52.086761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3a8485e7afa91b3e8cae63375d4d24b2ed1a381ae2efcc42fcc0db424804240

Aliases

arxiv: 1511.02756 · arxiv_version: 1511.02756v2 · doi: 10.48550/arxiv.1511.02756 · pith_short_12: 2OUEQXT27KI3 · pith_short_16: 2OUEQXT27KI3H2GK · pith_short_8: 2OUEQXT2

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/2OUEQXT27KI3H2GK4YZXLVGSJM \
  | 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: d3a8485e7afa91b3e8cae63375d4d24b2ed1a381ae2efcc42fcc0db424804240

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92a58e5709d52fb988a561e117e34353a29a27a16061065b8f0c938c00730867",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-11-09T16:55:46Z",
    "title_canon_sha256": "3b2b6bdaae6ab1948c930091d4af4383963a7301d2524b85c3c600f5e89a5df5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.02756",
    "kind": "arxiv",
    "version": 2
  }
}