Pith Number

pith:2WDC2ETG

pith:2005:2WDC2ETGIIK7QFIN2CRXOAICKS

not attested not anchored not stored refs pending

Hard Problems of Algebraic Geometry Codes

Qi Cheng

arxiv:cs/0507026 v1 · 2005-07-08 · 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{2WDC2ETGIIK7QFIN2CRXOAICKS}

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	2026-05-18T01:06:49.068741Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5862d12664215f8150dd0a3770102548e8662fb65be44591480528c39ac24a1

Aliases

arxiv: cs/0507026 · arxiv_version: cs/0507026v1 · doi: 10.48550/arxiv.cs/0507026 · pith_short_12: 2WDC2ETGIIK7 · pith_short_16: 2WDC2ETGIIK7QFIN · pith_short_8: 2WDC2ETG

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/2WDC2ETGIIK7QFIN2CRXOAICKS \
  | 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: d5862d12664215f8150dd0a3770102548e8662fb65be44591480528c39ac24a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1068626ecc0cec6ea3dcbcf3f19c194291f7f025ef617d7bcabece97725c39d0",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2005-07-08T16:22:52Z",
    "title_canon_sha256": "cb88d1476d6a2971f36d2d27ac166176d18324232eee92040a3727af33245143"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0507026",
    "kind": "arxiv",
    "version": 1
  }
}