Pith Number

pith:E6P624V4

pith:2018:E6P624V4EPG4SRMSPNAVEUOZTC

not attested not anchored not stored refs pending

Nondegenerate Motion of Singular Points in Obstacle Problems with Varying Data

Ivan Blank, Niles Armstrong

arxiv:1809.02895 v1 · 2018-09-08 · 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{E6P624V4EPG4SRMSPNAVEUOZTC}

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	2026-05-18T00:06:10.752047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

279fed72bc23cdc945927b415251d998bf5a5b51369b509156a17ca0bd48c4ce

Aliases

arxiv: 1809.02895 · arxiv_version: 1809.02895v1 · doi: 10.48550/arxiv.1809.02895 · pith_short_12: E6P624V4EPG4 · pith_short_16: E6P624V4EPG4SRMS · pith_short_8: E6P624V4

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/E6P624V4EPG4SRMSPNAVEUOZTC \
  | 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: 279fed72bc23cdc945927b415251d998bf5a5b51369b509156a17ca0bd48c4ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "061d561eadb98b3d7e746a2b631146c77a5908614f9245248dbf39dca6f8dd6f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2018-09-08T23:12:46Z",
    "title_canon_sha256": "c89e50049eb69d0ec9f6930da6d51b43b44d826dbde46dc7cca3ba932f1f7e08"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.02895",
    "kind": "arxiv",
    "version": 1
  }
}