Prithwijit De
Prithwijit De
Designation: ASSOCIATE PROFESSOR (G)
Alumnus of Indian Statistical Institute, Kolkata (B.Stat, M.Stat) and National University of Ireland, Cork (Ph.D)
Educational Qualification:
1. B. Stat (Hons), Indian Statistical Institute, Kolkata.
2. M. Stat, Indian Statistical Institute, Kolkata.
3. Ph.D (Statistics), National University of Ireland, Cork, Republic of Ireland.
Professional Experience:
1. Associate Professor: July, 2020 
Reader: July, 2012  June, 2020
Fellow: April, 2010  June, 2012
1.1 National Coordinator, Mathematical Olympiad (email: nc_matholy@hbcse.tifr.res.in)
1.2 Regional Coordinator, Mumbai region
2. Associated with the Mathematical Olympiad programme (http://olympiads.hbcse.tifr.res.in/subjects/mathematics/mathematicscell) in India.
International experience:
i) Leader of the Indian team to the International Mathematical Olympiad 2023, Chiba, Japan
ii) Leader of the Indian team to the European Girls' Mathematical Olympiad 2020, Egmond aan Zee, The Netherlands (virtual)
iii) Leader of the Indian team to the European Girls' Mathematical Olympiad 2018, Florence, Italy
iv) Leader of the Indian team to the International Mathematical Olympiad 2016, Hong Kong
v) Observer A of the Indian team to the International Mathematical Olympiad 2015, Chiang Mai, Thailand.
vi) Observer A of the Indian team to the International Mathematical Olympiad 2014, Cape Town, South Africa.
vii) Deputy Leader of the Indian team to the International Mathematical Olympiad 2011, Amsterdam, The Netherlands.
3. I have participated as a resource person in various Mathematics Olympiad training camps at both regional (RMOTC) and national level (INMOTC).
4. Member of the Editorial Committee of ''At Right Angles'', a publication of Azim Premji University together with Community Mathematics Centre, Rishi Valley, India (http://www.azimpremjiuniversity.edu.in/publications).
Publications:
I. Articles
21. The OddEven Tale
Prithwijit De
At Right Angles (India), pp.126  129, Vol.7, No.2, July 2018
20. On an Optimization Problem
Prithwijit De
At Right Angles (India), pp. 80  82, Vol.7, No.1, March, 2018
19. A Geometric Inequality and its Generalization
Prithwijit De
The Mathematics Teacher, pp. 4  10, Vol. 53, Issues 3 and 4, 2017.
18. A Triangle Problem and Three Variants
Prithwijit De
At Right Angles (India), pp. 31  36, Vol. 6, No. 3, November, 2017
17. LFHC  Area, Perimeter and Congruency (APC)
Prithwijit De, Swati Sircar, Sneha Titus
At Right Angles (India), pp. 53  58, Vol. 6, No. 3, November, 2017
16. On Problem Posing
Prithwijit De
At Right Angles (India), pp. 82  85, Vol. 6, No. 2, August, 2017
15. The Arithmetic Mean  Geometric Mean  Harmonic Mean Inequalities and a Spectrum of Applications
Prithwijit De
Resonance, pp. 1119  1133, Vol. 21, Issue 12, December, 2016
14. An Eye on Eyeball
Prithwijit De
At Right Angles (India), pp. 3437, Vol. 5, No.2, July, 2016
13. A Golden Maximum.
Prithwijit De
Mathematical Spectrum (U.K), pp. 132133, May, 2014.
12. A Fair Division.
Prithwijit De, Sneha Titus, Swati Sircar
At Right Angles (India),pp.3134,Vol. 3, No.1,March,2014
11. Always a Cube.
Prithwijit De
Mathematical Spectrum (U.K), pp.2933, September, 2012.
10. A Sweetseller’s Trick.
Prithwijit De
At Right Angles (India), pp. 1719, Vol 1, No. 1, June, 2012.
9. Height of Difficulty.
Prithwijit De
Mathematical Spectrum (U.K), pp. 8085, January, 2012.
8. Message in a Bottle.
Prithwijit De
Mathematical Spectrum (U.K), pp. 5052, January, 2011.
7. A Pouring Problem.
Prithwijit De
Mathematical Spectrum (U.K), pp. 35, September, 2010.
6. Caught up in a Box.
Prithwijit De
Mathematical Spectrum (U.K), pp. 115121, May, 2010.
5. A Farmer and a Fence.
Prithwijit De
Mathematical Spectrum (U.K), pp.7582, January, 2010.
4. Curious properties of the circumcircle and incircle of an equilateral triangle.
Prithwijit De
Mathematical Spectrum (U.K), pp.3236, September, 2008.
3. A pair of insoluble Diophantine equations arising from an equilateral triangle.
Prithwijit De
Mathematical Gazette (U.K), July, 2008.
2. Radii of touching circles: a trigonometric solution.
Prithwijit De
Mathematical Spectrum (U.K), pp. 7074, January, 2009.
1. From Immersion Heaters to Buoys.
Prithwijit De, Des MacHale
Mathematical Gazette (U.K), pp.519521, November, 2007.
II. Problems for which my solution was either published or acknowledged.
1. American Mathematical Monthly (MAA publication)
website: http://www.maa.org/publications/periodicals/americanmathematicalmonthly
Total: 62
2023: (1+)
12253 (March, 2023)
2022: (4)
12184 (with B.Sury), 12190 (February, 2022), 12231(AugSep, 2022), 12238 (December, 2022)
2021: (6)
12165 (November, 2021)
12154 (Aug  Sep, 2021)
12147 (June  July, 2021)
12140 (with B. Sury), 12144 (May, 2021)
12123 (February, 2021)
2020: (2)
12083, 12086 (August  September, 2020)
2019: (1)
11961 (Jan, 2019)
2018: (5)
11942 (AugSep, 2018)
11905 (February 2018)
11890, 11897, 11899 (January 2018)
2017: (2)
11881 (December, 2017)
11857 (May, 2017)
2016: (6)
11816, 11822 (with B. Sury and N. V. Tejaswi)
11815( Nov, 2016)
11754 (Mar 2016)
11737, 11758 (Jan 2016)
2015: (2)
11714 (JunJul, 2015)
11690 (Mar, 2015)
2014: (3)
11663, 11670 (Oct, 2014)
11630 (Jan, 2014)
2013: (2)
11622 (Dec, 2013)
11596 (May, 2013)
2012: (5)
11552, 11554 (Oct, 2012)
11550 (AugSep, 2012)
11509 (May 2012)
11511 (pp.6970, January, 2012)
2011: (4)
11486, 11492 (November, 2011)
11457 (April, 2011)
11443 (March, 2011)
2010: (3)
11386 (May, 2010)
11385 (March, 2010)
11357 (February, 2010)
2009: (3)
11325 (AugSep, 2009)
11301, 11306 (Jan, 2009)
2008: (6)
11289 (October, 2008)
11275 (Sep, 2008)
11245 (May, 2008)
11263 (April, 2008)
11240 (February, 2008)
11228 (January, 2008)
2007: (6)
11177 (pp.838,November, 2007)
11210, 11211, 11225 (October, 2007)
11160, 11168 (May, 2007)
2006: (1)
10483 (JunJul, 2006)
2. Crux Mathematicorum (A renowned problemsolving journal published by the Canadian Mathematical Society)
website: https://cms.math.ca/crux/
Total: 236
2023: (12+)
Mar  Apr: 4784, MA188, MA192, OC596, OC603
Jan  Feb: 4754, 4755, 4764, 4769, MA178, MA180, OC593
2022: (48)
Nov  Dec, 2022: MA171, MA174
Sep  Oct, 2022: 4722, 4726, 4728, MA160, MA165, OC 568, OC 569
May  Jun, 2022: 4694, 4695, 4698, 4699, 4700, 4705, MA146, MA147, MA150, MA152, MA154, MA 155, OC 561, OC 564
Mar  Apr, 2022: 4671, 4672, 4676, 4680, 4684, 4688, MA 136, MA 137, MA 142, MA 145, OC 551, OC 554
Jan  Feb, 2022: 4656, 4658, 4661, 4664, 4665, 4666, 4667, MA 131, MA 132, MA 133, OC 536, OC 537, OC 541
2021: (21)
Dec 2021: 4643
Nov 2021: 4637, 4639
Sep 2021: OC518, OC519
June 2021: MA105, 4602, 4604, 4606
May 2021: 4591, 4593
April 2021: 4581, 4586, OC 503
March 2021: 4579, 4580
February 2021: 4562, OC 491, OC 495
January 2021: 4560, OC489
2020: (27)
December 2020: 4541,4545, 4547, 4549
November 2020: 4532, 4535
October 2020: 4522, 4523, 4524, 4525, 4526, 4529, OC473, OC474
September 2020: 4511, 4512, 4516, 4518, 4519, OC468
June 2020: 4504, 4505, 4508
April 2020: 4482
May 2020: OC 459
March 2020: 4472
Feb 2020: 4470
2019: (14)
Nov 2019: 4432, 4435, 4440
Oct 2019: 4422, OC 425
Sep 2019: 4413, 4415, 4416, 4419
July 2019: 4383, 4385, 4386
May 2019: 4366
Mar 2019: 4335
2018: (15)
Sep 2018: 4269
Apr 2018: 4233, 4237, CC267
Mar 2018: OC 311, OC 312, 4221, 4224
Feb 2018: 4215, 4219
Jan 2018: 4204, 4206, OC301, OC302, OC303
2017: (17)
Dec 2017: 4192, 4197
Nov 2017: 4184, 4189
Oct 2017: 4171, 4175, 4177, CC239
Sep 2017: 4161
Jun 2017: 4160
Mar 2017: 4126 , 4129
Feb 2017: CC206, CC210, 4116, 4117
Jan 2017: 4108
2016: (17)
Dec 2016: 4095, 4099, CC200
Oct 2016: 4074, 4077, 4079, 4080, OC240.
Sep 2016: OC 233
May 2016: 4041, 4047, 4048, 4049, 4050
Apr 2016: 4037
Feb 2016: 4011
Jan 2016: 4008
2015: (15)
Dec 2015: 3993, 3994, 3997, 3998
Oct 2015: 3971, 3974
May 2015: 3948
Apr 2015: 3931 (pp.173174), 3933 (pp.175177), 3934 (pp.177), 3937 (pp.182), 3939 (pp.184185)
Feb 2015: 3911 (pp.7879), 3912 (pp.7980)
Jan 2015: 3903 (pp.34  35)
2014: (23)
Dec 2014: 3891 (pp.439440), 3897 (pp.447448), 3898 (pp.448449), 3899 (pp.449  451)
Nov 2014: 3882 (pp.396397); 3885 (pp.399400)
Sep 2014: 3862 (pp. 303); 3866 (pp. 307309)
Jun 2014: 3853 (pp. 264); 3855 (pp.265); 3856 (pp.266)
May 2014: 3841 (pp.217218)
April 2014: 3832 (pp. 168171); 3833 (pp. 171172); 3834 (pp.172173)
Mar 2014: 3822 (pp.125126); 3828 (pp. 131132)
Feb 2014: 3812 (pp.7778); 3814 (pp.8081); 3816 (pp.8485); 3818 (pp.8687)
Jan 2014: 3807 (pp.4041), 3808 (pp. 4142)
2013: (9)
Nov 2013: 3782 (pp. 419420), 3783 (pp. 420421)
Sep 2013: 3763 (pp. 328330)
Jun 2013: 3753 (pp. 279280), 3755 (pp. 281282)
May 2013: 3749 (pp. 242243)
April 2013: 3731 (pp.189)
March 2013: 3727 (pp.151152), 3728 (pp.153)
2012: (9)
June 2012: 3660 (pp.256)
May 2012: 3643 (pp.203), 3647 (pp. 208  209)
April 2012: 3632 (pp.154155), 3635 (pp. 158159)
March 2012: 3627 (pp.116117)
February 2012: 3611 (pp.71), 3613 (pp.73)
January 2012: 3609 (pp.3940)
2011: (9)
December 2011: 3598 (pp.556557)
November 2011: 3576 (pp.463464), 3577 (pp.464465)
October 2011: 3556 (pp.395396)
April 2011: 3528 (pp.178179), 3532 (pp.184185)
Mar 2011: 3514 (pp.117), 3525 (pp.127)
Feb 2011: 3505 (pp.57)
3. The College Mathematics Journal (MAA publication)
website: http://www.maa.org/publications/periodicals/collegemathematicsjournal/thecollegemathematicsjournal
September 2015: 1031 (pp.301302), 1034 (pp. 305306)
May 2014: 1003 (pp.224226)
March 2014: 998 (pp.148149)
January 2014: 995 (pp.6364)
November 2013: 989 (pp. 442444)
March 2013: 971 (pp.143), 972 (pp.144), 973 (pp.144146), 974 (pp.146147), 975 (pp.147148)
September 2009: 883 (pp.297299), 885 (pp.301303)
May 2009: 877 (pp.217218)
4. The Mathematical Gazette (UK)
website: http://www.ma.org.uk/jsp/index.jsp?lnk=620
November 2021: 105.C
March 2021: 104.E
July 2017: 100.K (pp.342)
March 2017: 100.F (pp.154156)
July 2012: 95.I (pp.352)
5. Mathematics Magazine (MAA publication)
website: http://www.maa.org/publications/periodicals/mathematicsmagazine
June 2021: 2100
January 2021: 2086 (with B.Sury),
February 2019: 2037
February 2018: 2012
December 2017: 2004 (pp. 387)
October 2017: 1997 (pp.301302)
December 2015: 1952 (pp.379380)
February 2015: 1936 (pp.7475)
February 2014: 1911 (pp.63)
December 2013: 1906 (pp. 383)
April 2013: 1891 (pp.148149)
June 2012: 1873 (pp.231232)
April 2008: 1767 (pp. 157)
October 2007: 1754 (pp.312)
April 2007: 1743 (pp. 148), 1744 (pp. 148149)
February 2007: 1736 (pp.7879), 1738 (pp.80)
June 2006: 1723 (pp.221222)
6. Irish Math.Soc.Bulletin
website: http://www.maths.tcd.ie/pub/ims/bulletin/
Winter 2012: 68.2 (pp.7071)
Winter 2013: 70.1 (pp.102103)
Winter 2017: 78.1 (pp.88), 78.2 (pp.8990)(jointly with Prof. Finbarr Holland)
Winter 2021: 86.2
7. Mathematical Excalibur (Hong Kong)
website: https://www.math.ust.hk/excalibur/
Problem 415 (pp.4, Vol. 17, No. 5, MarchApril, 2013)
Problem 466 (pp.3, Vol. 20, No. 1, July  October, 2015)
Problem 468 (pp.3, Vol. 20, No. 1, July  October, 2015)
Problem 486 (pp.3, Vol. 20, No. 5, Aug  September, 2016)
Problem 489 (pp.3, Vol. 20, No. 5, Aug  September, 2016)
Problem 491 (pp.3, Vol. 21, No.1, Oct 2016  March 2017)
Problem 526, 527 (pp.3, Vol 22, No.3, Feb  April, 2019)
Problem 531 (pp.3, Vol.22, No.4, May  October, 2019)
8. Mathematical Reflections {http://awesomemath.org/mathematicalreflections/}
Mathematical Reflections 5 (2016): J385 (pp.1), J389 (pp.5), S385 (pp.7), O385 (pp.20), O386 (pp.21)
Mathematical Reflections 2 (2016): S371 (pp.11)
Mathematical Reflections 3 (2015): J339 (pp.3), S338 (pp.9)
Mathematical Reflections 1 (2015): S327 (pp.1112), U326 (pp.17)
Mathematical Reflections 6 (2014): J320
Mathematical Reflections 5 (2014): J313 (pp.1), J317 (pp.6), S314 (pp.9), S315 (pp.10), S316 (pp.1112), S317 (pp.13)
Mathematical Reflections 4 (2014): J308 (pp.2), J311 (pp.5), J312 (pp.6), S307 (pp.7), U309 (pp.15)
Mathematical Reflections 2 (2014): J295 (pp.1)
Mathematical Reflections 3 (2013): J265 (pp.1).
Mathematical Reflections 1 (2013): J256 (pp.4), S253 (pp.7).
Mathematical Reflections 6 (2012): J249 (pp.3), S247 (pp.7), S248 (pp.8).
Mathematical Reflections 5 (2012): J243 (pp.3), S241 (pp.7), S245 (pp.11), O241 (pp.21).
Mathematical Reflections 4 (2012): J235 (pp.1), J237 (pp.3), S235 (pp.7).
Mathematical Reflections 2 (2012): J223 (pp.1), J225 (pp.3), S224 (pp.8), S228 (pp.12).
Mathematical Reflections 6 (2011): S211 (pp.7).
Mathematical Reflections 5 (2011): J199 (pp.1), J200 (pp.2), S201 (pp.9).
Mathematical Reflections 3 (2011): J188 (pp.2), J191 (pp.5), J192 (pp.67), S187 (pp.8), S190 (pp.11).
Mathematical Reflections 2 (2011): S181 (pp.8).
Mathematical Reflections 1 (2011): J175 (pp.1).
Mathematical Reflections 4 (2010): J163 (pp.1), J167 (pp.6), S164 (pp.11), S168 (pp. 1718).
III. Problems whose solutions were submitted and awaiting publication/acknowledgement
1. American Mathematical Monthly: 12343, 12371, 12385
2. CRUX Mathematicorum: 4792, 4795, 4797, 4801, 4803, 4804, 4810, 4812, 4813, 4814, 4817, 4820, 4826, 4827, 4833, 4838, 4841, 4842, 4843, 4846, OC580, OC610, OC 620, OC621, OC623, MA 207, MA 208
3. The College Mathematics Journal:
4. Mathematics Magazine: 2133
5. Mathematical Reflections:
6. Irish Math. Soc. Bulletin:
7. Mathematical Excalibur:
8. Mathematical Gazette: 106.C
Teaching Experience at Undergraduate and Postgraduate Level (taught at Centre for Excellence in Basic Sciences, Mumbai):
1. Jan  Apr, 2019: Discrete Mathematics
2. AugNov, 2018: Number Theory
3. JanApr, 2015: Differential Equations and Dynamical Systems; Graph Theory
4. AugNov, 2014: Introduction to Calculus. (course shared)
5. AugNov, 2013: Introduction to Calculus. (course shared)
6. AugNov, 2012: Discrete Mathematics.
Teaching Experience at Undergraduate and Postgraduate Level (taught at Centre for Excellence in Basic Sciences, Mumbai):
International Level
2020: Leader (EGMO)
2018: Leader (EGMO)
2016: Leader (IMO)
2015: Observer A (IMO)
2014: Observer A (IMO)
2011: Deputy Leader of the Indian IMO team.
National Level
1. Faculty for the International Mathematical Olympiad Training Camp (IMOTC).
2. Faculty for the EGMO Training Camp: 2018, 2019
3. Faculty for the following Indian National Mathematical Olympiad Training Camp(s) (INMOTC)
*2022: Mumbai, Maharashtra
*2020: Delhi; Mumbai, Maharashtra; Sikkim; Kolkata, West Bengal; Chennai, Tamil Nadu
* 2019: Mumbai, Maharashtra; SMIT, Majitar, Sikkim; Kochi, Kerala; Bangalore, Karnataka
* 2018: Mumbai, Maharashtra; JNV Rural, Bangalore, Karnataka; Kochi, Kerala; Chennai, Tamil Nadu
* 2017: Chennai, Tamil Nadu; Bangalore, Karnataka.
* 2015: Bangalore, Karnataka; Mumbai, Maharashtra; Chennai, Tamil Nadu.
∗ 2014: Bangalore, Karnataka; Dhamtari, Chhattisgarh; Chennai, Tamil Nadu.
∗ 2013: Chandigarh, Punjab; Raipur, Chhattisgarh; Chennai, Tamil Nadu.
∗ 2012: Durg, Chhattisgarh; Kolkata, West Bengal; Chennai, Tamil Nadu.
∗ 2010: Mumbai, Maharashtra.
Regional Level
Faculty for the following Regional Mathematical Olympiad Training Camp(s) (RMOTC)
* 2017: IMA, Bhubaneshwar.
* 2016: IMA, Bhubaneshwar.
* 2015: Pachhunga University College, Aizawl, Mizoram
* 2014: IMA, Bhubaneswar, Manipur University, Imphal, Manipur; Assam Academy of Mathematics, Guwahati, Assam; Noth Eastern Hill University, Shillong, Meghalaya
∗ 2013: Jawahar Navodaya Vidyalaya, Thiruvananthapuram; Atomic Energy Central School 4, Aunushaktinagar, Mumbai; IMA, Bhubaneswar.
∗ 2012: Jawahar Navodaya Vidyalaya, Thiruvananthapuram; Atomic Energy Central School 4, Aunushaktinagar, Mumbai; Parle Tilak
Vidyalaya, Vile Parle, Mumbai, IMA, Bhubaneshwar.
∗ 2011: Atomic Energy Central School 4, Anushaktinagar, Mumbai.
∗ 2010: Atomic Energy Central School 4, Anushaktinagar, Mumbai.
Talks/Lectures
June 2023: Lectured at the Madhava Nurture Camp held at St. Xavier's College, Ahmedabad.
May 2023: Lectured at the Epsilon India camp held at Chennai Mathematical Institute, Chennai.
March 2023:
Delivered a talk titled "An Invitation to the Indian Mathematical Olympiad Programme" at the Vidyasagar Science Olympiad Nurture Programme organised by JBNSTS, Kolkata.
December 2022:

Delivered a lecture at the NCERT Nurturance Programme for National Talent Search Awardees held at IISER, Thiruvananthapuram.
Title of the talk: Applications of lessons in school mathematics to problems in real life
November 2022:

Delivered an online lecture at the 59th Annual Conference of the Gujarat Ganit Mandal.
Title of the talk: Mathematical Problemsolving in School
May 2022: At Right Angles Webinar: "A Mathematical Take Away"
November 2021: Delivered a lecture at the Undergraduate Colloquium of the Department of Mathematics of Illinois State University, USA.
Title of the talk: Some Geometry Problems in Real Life
October 2018: Delivered a lecture at JSOJMO, 2018 organised by Atomic Energy Education Society and held at Atomic Energy Junior College, Anushakti Nagar, Mumbai
October 2017: Delivered a lecture at JSO JMO, 2017 organised by Atomic Energy Education Society and held at Atomic Energy Junior College, Anushakti Nagar, Mumbai
July 2017: Conducted a session on "Problem Solving and Designing" in APUHBCRMS workshop at HBCSE, Mumbai
November 2016: Conducted four sessions on Trigonometry for inservice teachers of Delhi Public School from all over India in a programme held at Delhi Public School, R. K. Puram, New Delhi
October 2016: Lectured Gujarat RMSA Teachers. Title: Interesting Problems for the Classroom
Lectured JSO/ JMO students at AECS 3. Title: Triangle Centres and their properties.
May 2016: Lectured KV TGT teachers on Problem Solving at HBCSE, Mumbai, India
November 2015: Delivered a talk on "Pythagorean Triples and Much More" at the INSPIRE Programme in Kolkata organized by Jagadis Bose
Centre for Excellence, Kolkata.
June, 2013: Delivered a talk on “Misconceptions in Mathematics” in a programme entitled “Innovative Teaching Techniques” organized by
BASE, Mumbai.
February, 2013: Conducted a session on Geometry for Teacher Educators from Gujarat. This was a part of the Teachers’ Professional Development
programme held at HBCSE.
September, 2012: Delivered a talk on mathematical problem solving to school teachers at a workshop organised by BASE at Nehru Science Centre, Mumbai.
February, 2012: Delivered a talk at the NCERT camp at HBCSE, Mumbai
December, 2011: Delivered a talk at the INSPIRE camp at Vaze College, Mumbai.
December, 2011: Delivered two lectures at the Professional Development and Technology Orientation Programme (PDTO) workshop organized by
the Department of Mathematics, Indian Institute of Tecnology, Mumbai.
October, 2011: Delivered a talk on Geometry at a science camp entitled New Horizon of Science organized by Jagadish Bose Science Talent
Search, Kolkata in association with DST, Govt. of India.
February, 2011: Delivered two lectures to NTS awardees at HBCSE, Mumbai.
July, 2010: Delivered two lectures at a Secondary School Teachers’ Training Programme organised by BASE.