What’s on my wall? – OurWarwick

What’s on my wall?

Not gonna lie – I didn’t go to many open days before uni. I’d seen uni accommodation on various summer schools, and was aware that most uni rooms have a pinboard. I definitely didn’t expect one quite as big as the one in my room at Whitefields. I wasn’t really sure what I was going to use it for at first, but over the past few months, it’s come in pretty handy…


1. A framed photo of my friends from sixth form

New friends are silver, old friends are gold – when you make new friends, don’t forget the old. I forget who taught me that little rhyme when I was in junior school, but it’s really resonated with me at Warwick. Don’t get me wrong – the friends I’ve made in the past few months are great, but it’s pretty normal to miss friends from back home. I keep in contact with them over Facebook, and we share our weird little stories about our uni experiences.

2. Definitions of injective and surjective functions

I get these two muddled a lot, so I drew some pictures to remind me before my January exam. They’re big enough that I can read them anywhere in my room, so I’ll get them drummed into my head eventually.

For those who are interested, a function is something that maps every element of set A to an element in set B – i.e. it must be defined for all elements of A. So for example:

f: R -> R, f(x) = x^2 is a function because all real values of x have a real-value square. Meanwhile, g: R -> R, g(x) = sqrt(x) is not a function, because R includes negative numbers, which don’t have real square roots.

An injective function is a function where every element of B is mapped to by at most one element of A.

A surjective function is a function where every element of B is mapped to by at least one element of A.

(Also, if a function is both injective and surjective, it’s called bijective – every element in B is mapped to by exactly one element in A)

3. Campus map

Warwick has a pretty big campus, so it’s easy to get lost in the first few weeks of term! There’s an online interactive map that’s quite useful for finding rooms, but I like having my paper copy on the wall too.

4. Euclidean Algorithm

This is a method of finding the highest common factor of two numbers, and I learnt about it for my Foundations module. According to a friend who does compsci, it’s apparently useful in security.

5. Definition of Completeness

A more fancy revision poster – it took a lot longer than the others, but it was worth it because it came in handy in my January exam!

It says that “every non-empty set bounded above has a supremum” – a non-empty set contains at least one element. Being bounded above means that you can pick values that are bigger than all elements in the set (for example, the set {…, -2, -1, 0, 1, 2} is bounded above, because if I picked any number greater than or equal to two, all of the elements in the set are smaller than or equal to it). A supremum is the smallest number that you can pick that is greater than or equal to all elements in a set. Put all that together, and you’ve got a definition for completeness.

6. Definition of continuity

This one’s from Analysis II – I made sure to kick off the term by memorising the definition in poster form. It can be read as “for all epsilon greater than zero, there exists a delta greater than zero such that if x is in the set E and the difference between x and c is less than delta, then the difference between the function of x and the function of c is less than epsilon”.

7. Pictures of different kinds of intervals

These are closed and open intervals, denoted by different kinds of brackets. It’s a less long-winded way of writing things like a =< x =< b.

8. Souvenirs from FIRST Lego League

I got given some copies of the medals from the tournaments I helped at in December. Having done FLL since 2011, I’ve got quite a collection now!

9. Wall calendar

With the use of Google Calendar and such, it’s not really an essential, but I jot notes down occasionally.

10. Timetable

My timetable changes a lot (picking up/dropping options, fitting in society stuff, etc), so I find it easier to look at a paper copy than a digital one.

11. Warwick Quiz Society Flyer

I got given this at the Societies Fair, and have kept it since then. Quiz Society is a big part of my "when I’m not maths-ing" Warwick experience.

12. Greek Alphabet

One of my flatmates is learning Greek as part of his course, so he wrote out the Greek alphabet for me. As a maths student, I’ve been seeing these letters a lot lately…

13. Ticket to The Marriage of Figaro

I went to see Opera Warwick’s adaptation at the Arts Centre with Quiz Soc, and it was very good!

14. My flatmate’s opinions on breakfast foods

It once came up in conversation as to what breakfasts are like “back home” in a mostly international flat. One of my flatmates wrote out the pieces of what she considers a Chinese breakfast and gave the list to me.

15. More pins!

I’ll probably need them.

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