Pith Number

pith:ILBTGYE6

pith:2019:ILBTGYE6EFQZ3HGPQ67K4FRGYC

not attested not anchored not stored refs pending

Local estimates on two linear parabolic equations with singular coefficients

Qi S Zhang

arxiv:1905.13329 v1 · 2019-05-30 · 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{ILBTGYE6EFQZ3HGPQ67K4FRGYC}

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	2026-05-17T23:44:35.279645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42c333609e21619d9ccf87beae1626c0a35c4f1520d5bb2ebc94b97fee2aff1f

Aliases

arxiv: 1905.13329 · arxiv_version: 1905.13329v1 · doi: 10.48550/arxiv.1905.13329 · pith_short_12: ILBTGYE6EFQZ · pith_short_16: ILBTGYE6EFQZ3HGP · pith_short_8: ILBTGYE6

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/ILBTGYE6EFQZ3HGPQ67K4FRGYC \
  | 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: 42c333609e21619d9ccf87beae1626c0a35c4f1520d5bb2ebc94b97fee2aff1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "100997315da3271370709dd6f59cf3809e54a42550ecdd96438aa7266aeb377d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-05-30T21:51:50Z",
    "title_canon_sha256": "09f34572ff983f184ecee6aa057b0fa8b7e8f2448965846bd93e6ab9d1c4274a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.13329",
    "kind": "arxiv",
    "version": 1
  }
}