were : (i)0pen University, (ii)Pythagoras' Theorem and

(iii)Logic and Cornnuter • . ,. ~:i ... i ''j •. f, .-..

On 6 August, Professor J.~. Kapur addressee the Societv

on "~'~.athematical models in social • .. .+ ,. , ;. , , .

sciences"~ Professor r·:,,·,·

i{anur is v -ice-chancellor of ~'-eerut TJniy~rsi ty I I;n0ia.

On 28 August, D:~;_. Y .r-' . Y8o~:! of the T}nive_rsity of Sin~at:)ore . g~ve ~~ lecture on :"A flt1.id m~chanical Model of the film

casting ~r6cess".

On 25 Septemb~r r nr. :M .... T. v!icJrs pf the Unive.rsity of Singar~ pore S!)oke to th~ S_ocicty on H ~'1athernatics of the -Hill ions " .

Professo~ · n.n. Ang of th~University of Saigon delivered a

lecture ' on ~~Ba-nach J-~.anifolds ·~ on 5 October. Professor .:1\ng

\.,as visiting Nanyang TJniversi.ty under the ASl\IHL- academic

exchange scheme •

. ·--.;"1••

0~ 26 6ctoher, Dr. K.~. Chan .of the Dnivcrsity of Singanore . -. ;- r '

gave a lecture on 11'rhrt:;e Classical l ,i!'1i ts ".

**********************

~ r ...

The speakers for forthcomin~ meetings are~

Pr. :0'\.J"... ; Che,.r of the Department of Mathematics,

Pqnyang University (for November)~

Dr. T .l·. . Peng of the Det:>a!"tme nt of ~~athematics,

.1Jniversity- of Singaoon~ (for December) r

Dr. S .J,. ~·7ilson of th0 DP.f.lartment of ~~athematics p

University of Singapore (for January) .

**********************

1. Dr. Chanq Boon Chong, a araduate of ~anvanq J~iversitv

and Universitv of ~oronto, Canada has joined the

University of Singaoore as Lecturer in ~~athematics.

2. Dr. I.arn T.ay Yonq has been a?pointef2 a r.-ouncil !"1:-em~er

of the Institute of Education.

(S)

3. Mr. Lim Kay Yeek has recently been re-elected Chairman

of the Postal and T

Hr. Ch~\·~ f.hin. ~-:':liong

!"!rs. Chia Ki 111 Lien

r1r. C:hong Kim '~eng

~r. Chong Kim Sing

~:.iss T-, q , '9 or q (p V a), p and a (p A q). not p("-' p) is constructed as follov.rs ~

':'ahle 1 , ,

p q p v a n 1\ ('f 'VO 1 , 1 1 0 .L l 0 1 (' ()

0 ,

1 () 1 J_

0 0 0 0 1

l denotes 1 the ?rO'?Osi tion is tnfe ' ::md 0 flP.nOt8s 'the

n ropo s ition is false'.

I!' set theory, let l . , R be h·ro s Rts and a c e rtain ohj e ct

is eithe r i n a set or not in a s e t. An In-Out Table for th0

{7) · ... .