Pith Number

pith:VRQD4S4I

pith:2011:VRQD4S4IOUEGESDMAIVYLVMLNV

not attested not anchored not stored refs pending

Efficient File Synchronization: a Distributed Source Coding Approach

David Tse, Kannan Ramchandran, Nan Ma

arxiv:1102.3669 v2 · 2011-02-17 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRQD4S4IOUEGESDMAIVYLVMLNV}

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	2026-05-18T00:58:19.084477Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac603e4b88750862486c022b85d58b6d5d971eefb93b4578c70cc773f6a0be69

Aliases

arxiv: 1102.3669 · arxiv_version: 1102.3669v2 · doi: 10.48550/arxiv.1102.3669 · pith_short_12: VRQD4S4IOUEG · pith_short_16: VRQD4S4IOUEGESDM · pith_short_8: VRQD4S4I

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/VRQD4S4IOUEGESDMAIVYLVMLNV \
  | 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: ac603e4b88750862486c022b85d58b6d5d971eefb93b4578c70cc773f6a0be69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "870f15d14fdb21ef721d410f29b68ccabaddcf2a90dc6f5e71e1929594ce2de2",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-02-17T19:38:19Z",
    "title_canon_sha256": "5e6aaa76d06daa8f7dae2402c16cc293b98f696bf681d698de3c772bc6d4f12f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.3669",
    "kind": "arxiv",
    "version": 2
  }
}