Uni Econ

JerryJan SG

Kindly explain wat tis question abt -

Convexity : let's us avoid wavy preference mappings

Given x,y,z E X, if x >/= z and y>/=z,

then it follows that tx + (1-t)y >/= z Vt E [0,1]

Thanks !

charlize SG

Helping your daughter do her homework?

deepak.c SG

That is JerryYan, this is JerryJan.

Fantagf SG

That is JerryYan, this is JerryJan.

Same person.

kena bully by the same people that is why she changed her nick

charlize SG

That is JerryYan, this is JerryJan.

My bad.

Old people need glasses.

deepak.c SG

char,

Any idea what she is asking?

charlize SG

char,

Any idea what she is asking?

It's more mathematical than economics.

Google lah.

wee_ws SG

Kindly explain wat tis question abt -

Convexity : let's us avoid wavy preference mappings

Given x,y,z E X, if x >/= z and y>/=z,

then it follows that tx + (1-t)y >/= z Vt E [0,1]

Thanks !

Hi,

It follows, by definition of a convex function:

http://mathworld.wolfram.com/ConvexFunction.html

Thanks!

Cheers,
Wen Shih

deepak.c SG

Looks like indifference curve to me.

JerryJan SG

Thanks Wen Shih hope she can understand it.

1 more question pls -

Local Non-Satiation :

V x E X and e > 0, then 3y E X s.t. [x-y] < e where y > x

Thanks again !

wee_ws SG

Thanks Wen Shih hope she can understand it.

1 more question pls -

Local Non-Satiation :

V x E X and e > 0, then 3y E X s.t. [x-y] < e where y > x

Thanks again !

Hi,

Again, this is a definition in consumption theory.

It is assumed that the consumer's preferences satisfy the property of local non-satiation.

Earlier in the discussion, the definition of convexity was meant to be one of the properties of the consumption feasible set.

Wow, it's a steep learning curve for anyone without some rigorous background in calculus and discrete mathematics!

Jiayou!

Cheers,
Wen Shih