Filing Details

Accession Number:
0001104659-21-043148
Form Type:
13G Filing
Publication Date:
2021-03-29 16:03:07
Filed By:
Healthcor Management LP
Company:
Research Alliance Corp. Ii
Filing Date:
2021-03-29
SEC Url:
13G Filing
Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
HealthCor Management 0 1,000,000 0 1,000,000 1,000,000 6.5%
HealthCor Associates 0 1,000,000 0 1,000,000 1,000,000 6.5%
HealthCor Offshore Master Fund 0 216,660 0 216,660 216,660 1.4%
HealthCor Offshore GP 0 216,660 0 216,660 216,660 1.4%
HealthCor Group 0 1,000,000 0 1,000,000 1,000,000 6.5%
Arthur Cohen 0 1,000,000 0 1,000,000 1,000,000 6.5%
Joseph Healey 0 1,000,000 0 1,000,000 1,000,000 6.5%
HealthCor Sanatate Offshore Master Fund 0 625,133 0 625,133 625,133 4.0%
HealthCor Offshore II GP 0 625,133 0 625,133 625,133 4.0%
HealthCor Therapeutics Master Fund 0 158,207 0 158,207 158,207 1.0%
HealthCor Therapeutics GP 0 158,207 0 158,207 158,207 1.0%
Filing
 

 

SECURITIES & EXCHANGE COMMISSION

Washington, D.C. 20549

 

 

 

SCHEDULE 13G

(Rule 13d-102)

 

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2

 

(Amendment No. _ )*

 

Research Alliance Corp. II

(Name of Issuer)

 

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

 

760873109

(CUSIP Number)

 

March 18, 2021

(Date of Event Which Requires Filing of this Statement)

 

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

 

¨Rule 13d-1(b)
xRule 13d-1(c)
¨Rule 13d-1(d)

 

(Page 1 of 17 Pages)

 

 

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

 

The information required in the remainder of this cover page shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 

 

 

CUSIP No. 760873109 13G Page 2 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Management, L.P.

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

1,000,000

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

1,000,000

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

1,000,000

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions)

¨

(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

6.5%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

PN

 

 

CUSIP No. 760873109 13G Page 3 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Associates, LLC

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

1,000,000

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

1,000,000

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

1,000,000

(10)

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions)

¨

(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

6.5%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

OO - limited liability company

 

 

CUSIP No. 760873109 13G Page 4 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Offshore Master Fund, L.P.

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Cayman Islands

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

216,660

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

216,660

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

216,660

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

1.4%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

PN

 

 

CUSIP No. 760873109 13G Page 5 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Offshore GP, LLC

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

216,660

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

216,660

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

216,660

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

1.4%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

OO – limited liability company

 

 

CUSIP No. 760873109 13G Page 6 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Group, LLC

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

1,000,000

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

1,000,000

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

1,000,000

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

6.5%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

OO – limited liability company

 

 

CUSIP No. 760873109 13G Page 7 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

Arthur Cohen

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

United States

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

1,000,000

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

1,000,000

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

1,000,000

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

6.5%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

IN

 

 

CUSIP No. 760873109 13G Page 8 of 17 Pages

 

 

(1)

NAMES OF REPORTING PERSONS

Joseph Healey

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

United States

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

1,000,000

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

1,000,000

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

1,000,000

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

6.5%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

IN

 

 

CUSIP No. 760873109 13G Page 9 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Sanatate Offshore Master Fund, L.P.

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Cayman Islands

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

625,133

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

625,133

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

625,133

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

4.0%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

PN

 

 

CUSIP No. 760873109 13G Page 10 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Offshore II GP, LLC

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

625,133

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

625,133

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

625,133

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

4.0%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

OO - limited liability company

 

 

CUSIP No. 760873109 13G Page 11 of 17 Pages

 

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Therapeutics Master Fund, L.P.

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Cayman Islands

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

158,207

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

158,207

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

158,207

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

1.0%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

PN

 

 

CUSIP No. 760873109 13G Page 12 of 17 Pages

 

(1)

NAMES OF REPORTING PERSONS

HealthCor Therapeutics GP, LLC

 

(2)

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

 

(a)   ¨
(b)  
x

(3)

SEC USE ONLY

(4)

CITIZENSHIP OR PLACE OF ORGANIZATION

 

Delaware

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
(5)

SOLE VOTING POWER

 

0

(6)

SHARED VOTING POWER

 

158,207

(7)

SOLE DISPOSITIVE POWER

 

0

(8)

SHARED DISPOSITIVE POWER

 

158,207

(9)

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

158,207

(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see instructions) ¨
(11)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 

1.0%

(12)

TYPE OF REPORTING PERSON (see instructions)

 

OO - limited liability company

 

 

CUSIP No. 760873109 13G Page 13 of 17 Pages

 

Item 1 (a).Name of Issuer:
 Research Alliance Corp. II

 

Item 1 (b).Address of Issuer's Principal Executive Offices:
 3172 North Rainbow Blvd. #1278, Las Vegas, NV 89108

 

Item 2(a, b, c).Name of Person Filing:

 

(i) HealthCor Management, L.P., a Delaware limited partnership, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(ii) HealthCor Associates, LLC, a Delaware limited liability company, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(iii) HealthCor Offshore Master Fund, L.P., a Cayman Islands limited partnership, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(iv) HealthCor Offshore GP, LLC, a Delaware limited liability company, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(v) HealthCor Group, LLC, a Delaware limited liability company, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(vi) Joseph Healey, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(vii) Arthur Cohen, 12 South Main Street, #203 Norwalk, CT 06854;

 

(viii) HealthCor Sanatate Offshore Master Fund, L.P., a Cayman Islands limited partnership, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(ix) HealthCor Offshore II GP, LLC, a Delaware limited liability company, 55 Hudson Yards, 28th Floor, New York, NY 10001;

 

(x) HealthCor Therapeutics Master Fund, L.P., a Cayman Islands limited partnership, 55 Hudson Yards, 28th Floor, New York, NY 10001; and

 

(xi) HealthCor Therapeutics GP, LLC, a Delaware limited liability company, 55 Hudson Yards, 28th Floor, New York, NY 10001.

 

Both Mr. Healey and Mr. Cohen are United States citizens.

 

The persons at (i) through (xi) above are collectively referred to herein as the "Reporting Persons".

 

 

CUSIP No. 760873109 13G Page 14 of 17 Pages

 

Item 2(d).Title of Class of Securities: Class A Ordinary Shares, par value $0.0001 per share (the "Ordinary Shares")

 

Item 2(e).760873109

 

Item 3.Not applicable.

 

Item 4.Ownership.

 

The information required by Items 4(a) - (c) is set forth in Rows 5 - 11 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

 

Collectively, HealthCor Offshore Master Fund, L.P., HealthCor Therapeutics Master Fund, L.P. and HealthCor Sanatate Offshore Master Fund, L.P. (each a "Fund" and together, the "Funds") are the beneficial owners of a total of 1,000,000 Ordinary Shares of the Issuer.

 

HealthCor Offshore GP, LLC is the general partner of HealthCor Offshore Master Fund, L.P. Accordingly, HealthCor Offshore GP, LLC may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Offshore Master Fund, L.P. HealthCor Group, LLC is the managing member of HealthCor Offshore GP, LLC and, therefore, may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Offshore Master Fund, L.P.

 

HealthCor Offshore II GP, LLC is the general partner of HealthCor Sanatate Offshore Master Fund, L.P. Accordingly, HealthCor Offshore II GP, LLC may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Sanatate Offshore Master Fund, L.P. HealthCor Group, LLC is the managing member of HealthCor Offshore II GP, LLC and, therefore, may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Sanatate Offshore Master Fund, L.P.

 

HealthCor Therapeutics GP, LLC is the general partner of HealthCor Therapeutics Master Fund, L.P. Accordingly, HealthCor Therapeutics GP, LLC may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Therapeutics Master Fund, L.P. HealthCor Group, LLC is the managing member of HealthCor Therapeutics GP, LLC and, therefore, may be deemed to beneficially own the Ordinary Shares that are beneficially owned by HealthCor Therapeutics Master Fund, L.P.

 

 

CUSIP No. G5960S116 13G Page 15 of 17 Pages

 

By virtue of its position as the investment manager of the Funds, HealthCor Management, L.P. may be deemed a beneficial owner of the Ordinary Shares owned by the Funds. HealthCor Associates, LLC is the general partner of HealthCor Management, L.P. and thus may also be deemed to beneficially own the Ordinary Shares that are beneficially owned by the Funds.

 

As the Managers of HealthCor Associates, LLC, Arthur Cohen and Joseph Healey exercise both voting and investment power with respect to the Ordinary Shares reported herein, and therefore each may be deemed a beneficial owner of such Ordinary Shares.

 

Each of the Reporting Persons hereby disclaims any beneficial ownership of any such Ordinary Shares in excess of their actual pecuniary interest therein.

 

Item 5.Ownership of Five Percent or Less of a Class:

 

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ¨.

 

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Not Applicable

 

Item 7.Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.

Not Applicable

 

Item 8.Identification and Classification of Members of the Group.

See Exhibit I.

 

Item 9.Notice of Dissolution of Group.

Not Applicable

 

Item 10.Certification.

 

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

 

Exhibits:

 

Exhibit I: Joint Acquisition Statement

 

 

CUSIP No. 760873109 13G Page 16 of 17 Pages

 

SIGNATURE

 

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

 

DATED: March 29, 2021

 

  HEALTHCOR MANAGEMENT, L.P.
     
    By: HealthCor Associates, LLC, its general partner
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel

 

  HEALTHCOR OFFSHORE GP, LLC, for itself and as general partner of behalf of HEALTHCOR OFFSHORE MASTER FUND, L.P.
     
    By: HealthCor Group, LLC, its general partner
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel

 

 

CUSIP No. 760873109 13G Page 17 of 17 Pages

 

  HEALTHCOR OFFSHORE II GP, LLC, for itself and as general partner of behalf of HEALTHCOR SANATATE OFFSHORE MASTER FUND, L.P.
     
    By: HealthCor Group, LLC, its general partner
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel
     
  HEALTHCOR THERAPEUTICS GP, LLC, for itself and as general partner of behalf of HEALTHCOR THERAPEUTICS MASTER FUND, L.P.
     
    By: HealthCor Group, LLC, its general partner
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel
     
  HEALTHCOR ASSOCIATES, LLC
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel
     
  HEALTHCOR GROUP, LLC
     
    /s/ Anabelle P. Gray
    Name: Anabelle P. Gray
    Title:   General Counsel
     
  JOSEPH HEALEY, Individually
     
    /s/ Joseph Healey
     
  ARTHUR COHEN, Individually
     
    /s/ Arthur Cohen