Pith Number

pith:MZDXEAC2

pith:2013:MZDXEAC2H2Y2V5TOLZLFKNQQ4T

not attested not anchored not stored refs pending

Multiplicity of Positive Solutions for an Obstacle Problem in R

Claudianor O. Alves, Francisco Julio S.A. Corr\^ea

arxiv:1304.5077 v2 · 2013-04-18 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MZDXEAC2H2Y2V5TOLZLFKNQQ4T}

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	2026-05-18T03:05:01.459563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

664772005a3eb1aaf66e5e56553610e4c80bac7366be74db1756806d5658b218

Aliases

arxiv: 1304.5077 · arxiv_version: 1304.5077v2 · doi: 10.48550/arxiv.1304.5077 · pith_short_12: MZDXEAC2H2Y2 · pith_short_16: MZDXEAC2H2Y2V5TO · pith_short_8: MZDXEAC2

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/MZDXEAC2H2Y2V5TOLZLFKNQQ4T \
  | 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: 664772005a3eb1aaf66e5e56553610e4c80bac7366be74db1756806d5658b218

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1e89c409b92fe9082b1b32e6f3fd9d623c0af227bcd51a45631be9c4af42b96c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2013-04-18T10:51:28Z",
    "title_canon_sha256": "73a14b85818327b98e95abe7805d9a28439027eb88201db436e5fe2fd0977f6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.5077",
    "kind": "arxiv",
    "version": 2
  }
}