Pith Number

pith:ZKEY4UNT

pith:2008:ZKEY4UNT7AZA4N7WRUUGKGQ66K

not attested not anchored not stored refs pending

OPED reconstruction algorithm for limited angle problem

Oleg Tischenko, Yuan Xu

arxiv:0810.1705 v2 · 2008-10-09 · math.NA · cs.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{ZKEY4UNT7AZA4N7WRUUGKGQ66K}

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	2026-06-03T23:06:07.986195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca898e51b3f8320e37f68d28651a1ef281d89aaa96c025a19b0f1c01504c589b

Aliases

arxiv: 0810.1705 · arxiv_version: 0810.1705v2 · doi: 10.48550/arxiv.0810.1705 · pith_short_12: ZKEY4UNT7AZA · pith_short_16: ZKEY4UNT7AZA4N7W · pith_short_8: ZKEY4UNT

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/ZKEY4UNT7AZA4N7WRUUGKGQ66K \
  | 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: ca898e51b3f8320e37f68d28651a1ef281d89aaa96c025a19b0f1c01504c589b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402633b8326f49780df8485d9a555628b4b7e2ec743052559b6109713a9b5a49",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2008-10-09T17:51:14Z",
    "title_canon_sha256": "a179a7de85a77fdc8667e733f5f32e537b67c4109c6e28d134ec541d6403550c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.1705",
    "kind": "arxiv",
    "version": 2
  }
}