Pith Number

pith:EUH5R3EE

pith:2016:EUH5R3EEK35ASG35526DQBS37J

not attested not anchored not stored refs pending

The forward-backward algorithm and the normal problem

Walaa M. Moursi

arxiv:1608.02240 v1 · 2016-08-07 · math.OC · 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{EUH5R3EEK35ASG35526DQBS37J}

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	2026-05-18T01:09:40.664671Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

250fd8ec8456fa091b7deebc38065bfa6cb4b8356111919416b622ccc6396d84

Aliases

arxiv: 1608.02240 · arxiv_version: 1608.02240v1 · doi: 10.48550/arxiv.1608.02240 · pith_short_12: EUH5R3EEK35A · pith_short_16: EUH5R3EEK35ASG35 · pith_short_8: EUH5R3EE

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/EUH5R3EEK35ASG35526DQBS37J \
  | 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: 250fd8ec8456fa091b7deebc38065bfa6cb4b8356111919416b622ccc6396d84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5866d6aecfa855793ae8cebb8444c3dda3afc689a148b149a4eaae7461970a7c",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-08-07T16:44:52Z",
    "title_canon_sha256": "d1b48e43d5b106c8d2b9ab1061aa96d2ab3fbf3fe597cf961e44e2ec47412265"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.02240",
    "kind": "arxiv",
    "version": 1
  }
}