Pith Number

pith:BQ6JMBHY

pith:2018:BQ6JMBHYSILEUHROTFZFKFX6NV

not attested not anchored not stored refs pending

The fractional unstable obstacle problem

Mariana Smit Vega Garcia, Mark Allen

arxiv:1811.12497 v1 · 2018-11-29 · 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{BQ6JMBHYSILEUHROTFZFKFX6NV}

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	2026-05-17T23:59:29.456249Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c3c9604f892164a1e2e99725516fe6d5610bc14965042f2014d2eec91a42c53

Aliases

arxiv: 1811.12497 · arxiv_version: 1811.12497v1 · doi: 10.48550/arxiv.1811.12497 · pith_short_12: BQ6JMBHYSILE · pith_short_16: BQ6JMBHYSILEUHRO · pith_short_8: BQ6JMBHY

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/BQ6JMBHYSILEUHROTFZFKFX6NV \
  | 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: 0c3c9604f892164a1e2e99725516fe6d5610bc14965042f2014d2eec91a42c53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb65704c92aff38a40176682b468b6287313f9b01c134c305ad4c5899d7bdd67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2018-11-29T21:36:39Z",
    "title_canon_sha256": "3cef59a1a1b741475ccd4b3c7e785ea5e221ea3d0115b13ebb60d3462ad39663"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.12497",
    "kind": "arxiv",
    "version": 1
  }
}