Pith Number

pith:EDTRFBFC

pith:2025:EDTRFBFCEWQVMUMPXYFRI2UW2A

not attested not anchored not stored refs pending

Support identification for parameter variations in a PDE system via regularized methods

Chayma Nssibi, Houcine Meftahi

arxiv:2505.21663 v1 · 2025-05-27 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EDTRFBFCEWQVMUMPXYFRI2UW2A}

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	2026-07-05T11:11:01.746842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20e71284a225a156518fbe0b146a96d0099ae15adbff53e7d8789679e4bc4b80

Aliases

arxiv: 2505.21663 · arxiv_version: 2505.21663v1 · doi: 10.48550/arxiv.2505.21663 · pith_short_12: EDTRFBFCEWQV · pith_short_16: EDTRFBFCEWQVMUMP · pith_short_8: EDTRFBFC

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/EDTRFBFCEWQVMUMPXYFRI2UW2A \
  | 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: 20e71284a225a156518fbe0b146a96d0099ae15adbff53e7d8789679e4bc4b80

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf6b0ae521f8a67d978e157b49ffc0df856e90f5e8862d981403da7e4e609b8e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2025-05-27T18:42:11Z",
    "title_canon_sha256": "3a0f640f02fedda773f53e534a20015ce855da641cf5a6269b8138983a01ed34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.21663",
    "kind": "arxiv",
    "version": 1
  }
}