Pith Number

pith:T3ZH3MMJ

pith:2021:T3ZH3MMJ2C5V5MYGI76JA6MK22

not attested not anchored not stored refs pending

Environmental Impacts of Personal Protective Clothing Used to Combat COVID-19

Chris Carr, Kostya S Novoselov, Mohammad Abbas Uddin, Nazmul Karim, Shaila Afroj, Tahmid Hasan

arxiv:2109.01037 v1 · 2021-09-02 · physics.med-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T3ZH3MMJ2C5V5MYGI76JA6MK22}

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	2026-07-05T03:11:49.544170Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ef27db189d0bb5eb30647fc90798ad688eeec39ea0c9e33730c2eadb213d56b

Aliases

arxiv: 2109.01037 · arxiv_version: 2109.01037v1 · doi: 10.48550/arxiv.2109.01037 · pith_short_12: T3ZH3MMJ2C5V · pith_short_16: T3ZH3MMJ2C5V5MYG · pith_short_8: T3ZH3MMJ

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/T3ZH3MMJ2C5V5MYGI76JA6MK22 \
  | 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: 9ef27db189d0bb5eb30647fc90798ad688eeec39ea0c9e33730c2eadb213d56b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45cbca212015088937a5c350196762d903194fe5b82d81484708933cdefe4520",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2021-09-02T15:55:19Z",
    "title_canon_sha256": "729807ee4ee76b9b783f2a5e52adcfa21071a2e430953581f54098c6fe8ed4ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01037",
    "kind": "arxiv",
    "version": 1
  }
}