Pith Number

pith:7QX2AUFR

pith:2013:7QX2AUFRRE6NFT5V4A6ZGGSXKF

not attested not anchored not stored refs pending

SPH Entropy Errors and the Pressure Blip

Kunal Puri, Prabhu Ramachandran

arxiv:1311.2167 v2 · 2013-11-09 · cs.CE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7QX2AUFRRE6NFT5V4A6ZGGSXKF}

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	2026-05-18T02:57:26.302047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc2fa050b1893cd2cfb5e03d931a57516abb6284914107b316476ce2db668136

Aliases

arxiv: 1311.2167 · arxiv_version: 1311.2167v2 · doi: 10.48550/arxiv.1311.2167 · pith_short_12: 7QX2AUFRRE6N · pith_short_16: 7QX2AUFRRE6NFT5V · pith_short_8: 7QX2AUFR

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/7QX2AUFRRE6NFT5V4A6ZGGSXKF \
  | 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: fc2fa050b1893cd2cfb5e03d931a57516abb6284914107b316476ce2db668136

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daf55687ff83b7fa83ebc7c0b3fb0def58a907ab91fa69e8efeef8804a863ab2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2013-11-09T12:59:38Z",
    "title_canon_sha256": "e3dc606dbc5c8ba0f5bc1f752520d0648df68ff3d0f4b98260d3fefb43dd3c9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2167",
    "kind": "arxiv",
    "version": 2
  }
}