Monday 30 March 2020

MATHEMATICAL LANGUAGE AND NATURAL HUMAN LANGUAGES

       
 I will try to compare natural human languages and mathematical language in order to try to answer the question '''Is Maths really a language?' This is a very big question which will require a lot of writing and my purpose is not to make you feel bored but to fire your curiosity about the topic, and after that you will carry on exploring by yourself. That's why I will do this comparison briefly. 
Maths is really very often called a language and it is true that Maths is used in many other areas of human knowledge as a tool. Remember engineering, science, geography and almost every other area, they use something from Maths. It looks like the Maths language exists to serve  others by offering them a lot – arithmetic, statistical graphical ways to represent certain knowledge, probability, which is part of a risk assessment, geometry is everywhere in building business and algebra is just sometimes so annoying with her constant effort to find ‘X’ in our lives. But this is what we are doing very often in our lives – we are detectives who are trying to solve our own little mysteries. So, we agree, Maths is present in every aspect in our personal and professional lives.

What is a natural human language then? By 'natural' I mean languages which are spoken by people and which develop through the centuries.  They could be official state languages or a dialect, which is a language which is spoken locally and it doesn't have official state status. There are more than 6000 languages in the world and most of them are disappearing, mainly due to migration. Some of the languages are big – many people use them, such English, Arabic, Russian, Spanish and some others. Some are little and some of them are micro-languages. I spent some time of my university career doing research about one very little Slavic micro-language – the Upper Sorbian language and I even wrote two books about this language. It is spoken in Eastern Germany and it is a disappearing language (only around 50 000 people are speaking it), people are bilingual – they know German as well. Their  main cultural place is called Bautzen. It is 60 km from Dresden. They have a Sorbian institute there in Bautzen and I have been there many times to do research about my books.

What is the definition of a natural human language? We want to compare Maths language with human languages so we need to have a starting point and we need to know that the things we are comparing are comparable.


Let's take this definition as a working one: ' Natural human languages have a structure which consists of many systems of symbols and signs. There is a great hierarchy between the systems. The main function of human languages is  communicative, people use them to communicate between themselves.' It is not a perfect definition but it gives us main features of the language and we will try to find the same features in the Maths language. So, we are looking for similarities and differences.

Human languages have systems of symbols and there is a hierarchy between these systems. That means that the structure of the languages is like a pyramid and if we miss learning one stage we won't be able to build the next one. We start with the alphabet that gives us the letters, but behind the letters there are sounds. So we have letters, sounds, we connect them and we build words, we connect the words following the rules of the Grammar, Semantics, Syntax and we create the sentences. We connect the sentences together and we build a text. The text is the highest floor of the language and the definition for the text is – ‘The text exists when we have at least two sentences connected together semantically and syntactically.’ Let's sum up that the hierarchy of the language includes floors for letters, sounds, words, sentences, text. They connect by the rules of the Grammar, the Semantics and the Syntax. This is the most simple understanding but we don't need it to be complicated. To say that you know a language you need to know the speaking part – listening and understanding, reading, understanding and  writing. The teacher should know all of these levels of a certain language if he teaches it, otherwise it is not fair to the students.

One more thing – the definition in the beginning included – 'communicative function'. This is the main function of human languages – they developed because of the need of people to communicate using their symbolic nature. There are other functions like creative and some others, but we are not interested in that now. Languages are very complex organisms, which develop by their own rules. Most of the time linguists only register the  changes they cannot influence the change to happen.

What about the Mathematical language? Does it look the same as human languages? There are different opinions but we can see for sure some similarities and some differences.

Similarities: Mathematics uses symbols and signs as well, there is a hierarchy between the systems as well. Like in the languages if you miss one system you cannot build the other, the upper one. You have digits, numbers that connect with operation symbols (signs for add, subtract, multiply, divide), then they connect to create expressions, formulas, identities, inequalities, and there is a story behind this, so they express certain meanings and intentions.  

In human languages and in Maths language we have parts of speech. Remember the parts of speech in English for example? Actually, in every language they are the same (with some differences): Noun, Verb, Adjective, Pronoun, Adverb, Preposition, Conjunctions, Particles  and Interjection. 
We can talk about  parts of Mathematical speech as well, which have the same functions like in human languages, and they are:
  1. Digits and numbers are like equivalents of Nouns in human languages. 
  2. Operation symbols are actions, like verbs in the languages.
  3.  Relation symbols - ‘equal to’, ‘greater than’, ‘less than’, they are statesman of comparison, of relationships. In a human language this is equivalent to adjectives and adverbs. 
  4. Grouping symbols (like brackets) and they show the associations. In a human language this is equivalent to punctuation.  
  5. Variables or Place holders and they are the unknowns. In the human language they are equivalent to pronouns. 
 The Mathematical language is specific and exact but at the same time it is highly abstract – when we say ‘4’ we don't mean any object behind, it could apply to anything - to a very tiny object but to the whole universe as well. Problem solving is like the text – it expresses the application of the skills (the sentences). 

What are mathematical functions? Can we use it to communicate? Yes, we can communicate certain knowledge and intentions, certain more  complex thoughts, ideas and concepts. Many fields of knowledge use the mathematical language to communicate their ideas.

Differences: It is a matter of convention that the mathematical language is not used for everyday communication. If people agree what kind of syntax will express certain meaning, maybe we can even write poetry.  This will be tricky because the poetic language is full of metaphors and comparisons. It is not Maths’ fault that it didn't develop in the same direction as natural languages. We can say that the Maths language exists more in a written form.

So, both  natural human languages and the mathematical language, together they allow people to express all possible intentions, highly logical, using mathematical language, and highly poetic, using natural human languages.

I hope that this brief comparison made you think about some problems you never spent time thinking about before. If this will happen even only  to some of you, I will be happy to be able to open your eyes for some unusual sides
of Maths knowledge. Thinking (together with Love) is one of the biggest joys we can experience. 

I have one activity for you:
 Use your own native/first language and compare it with Maths language. Choose some features to compare, make a list and put them in a Venn diagram. For example: if you speak French, your Venn diagram should be about comparing French language and Maths language. It will be interesting to see your Venn diagrams. In the intersection part there will be the features which are common for both.

In our lives we are like walking human Venn diagrams. Relationships could  sometimes be complicated, especially if there is no intersection area between the two human Venn diagrams. This is a sad case when people just don't go well together because they are two circles, two parts of a Venn diagram without intersection between. We can improve this by  making an effort of building the intersection area in our relationships with other people – the things that connect us, the things that unites us. Peace in the world depends on the intersection area between us. 

Let's hope you learnt something more about Maths and you love Maths and the  languages even more. 


(E. S. Lyubenova; LoveMathsStory for my students)

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